coral, underwater

401 media by topicpage 1 of 5
A group of sea anemons in an aquarium. Sea anemones actiniaria water lilies

A group of sea anemons in an aquarium. Sea anemones actiniaria water l...

An illustration of an underwater scene / A painting of a group of sea creatures / Public domain art photo.

Diverse Coral Reef - National Parks Gallery

Diverse Coral Reef - National Parks Gallery

Marine scientists have predicted that coral reefs worldwide, including those within the National Park of American Samoa (NPSA), will suffer substantial mortality over the next 20-30 years due to global warming.(nps.gov)

Cabrit Underwater Scene - National Parks Gallery

Cabrit Underwater Scene - National Parks Gallery

Hard corals take hold even in the surf zone. Cabrit Horn is on the south shore of St. John.

Underwater images - Zebra Shark

Underwater images - Zebra Shark

All juveniles have dark bodies with yellowish stripes but they eventually lose their stripes and the pattern changes to spots, often causing the shark to be identified as a leopard shark! The zebra shark (Stego... More

Ornate Butterfly Fish - National Parks Gallery

Ornate Butterfly Fish - National Parks Gallery

The ornate butterfly fish is abundant on Samoan Reefs.

Coral and Mangroves - National Parks Gallery

Coral and Mangroves - National Parks Gallery

Coral and Mangroves Public domain photograph by National Parks Administration, nature conservation, tourism, free to use, no copyright restrictions image - Picryl description

Orange Fin Anemonefish (Amphiprion chrysopterus)

Orange Fin Anemonefish (Amphiprion chrysopterus)

Clownfish form symbiotic associations with anemones. The clownfish is covered with a thick layer of mucus at birth which protects them from the stinging tentacles of the anemone.

National parks: Seafan - public domain image

National parks: Seafan - public domain image

Spur and groove relief with fantastic soft and hard coral growth

Christmas Tree Worm - National Parks Gallery

Christmas Tree Worm - National Parks Gallery

Christmas Tree Worms are commonly found throughout the world's tropical oceans. The worm embeds itself into stony coral heads and if the worm detects a disturbance, it disappears, pulling in its gills and closi... More

Pillar Coral Forest - National Parks Gallery

Pillar Coral Forest - National Parks Gallery

View through an underwater pillar coral forest Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Fish in Coral - National Parks Gallery

Fish in Coral - National Parks Gallery

Fish on Reef Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Virgin Islands public domain photo - Elkhorn Coral

Virgin Islands public domain photo - Elkhorn Coral

Elkhorn Coral is an endangered and protected species. Anchoring in the Virgin Islands National Park is only allowed in three locations. Know the regulations and keep the reefs safe for future generations. viis... More

Underwater images - VIIS_WATER_150512-165

Underwater images - VIIS_WATER_150512-165

Public domain photograph by National Parks Administration, nature conservation, tourism, free to use, no copyright restrictions image - Picryl description

Pink Sponge below the surface - Public Domain image, National Parks Gallery

Pink Sponge below the surface - Public Domain image, National Parks Ga...

Pink Sponge below the surface, growing on a mangrove root Public domain photograph of coral reef, underwater life, free to use, no copyright restrictions image - Picryl description

Underwater images - VIIS_WHIS_150511-122

Underwater images - VIIS_WHIS_150511-122

Underwater Landscape Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Fish on Reef - National Parks Gallery

Fish on Reef - National Parks Gallery

Fish on Reef Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Mangrove Root and Sponge Fauna - Public Domain image, National Parks Gallery

Mangrove Root and Sponge Fauna - Public Domain image, National Parks G...

Mangrove Root and Sponge Fauna Public domain photograph by National Parks Administration, nature conservation, tourism, free to use, no copyright restrictions image - Picryl description

Underwater images - Mushroom Coral

Underwater images - Mushroom Coral

Most corals are firmly attached to the reef, but a few are not. One common type that isn’t attached is the “mushroom coral”. These corals, in the genus Fungia, look like a mushroom cap that has been turned over... More

Underwater images - Blue Tang - Public Domain image, National Parks Gallery

Underwater images - Blue Tang - Public Domain image, National Parks Ga...

Blue Tang swim over a coral reef Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Christmas Tree Worm - National Parks Gallery

Christmas Tree Worm - National Parks Gallery

Christmas Tree Worm Public domain photograph related to US National Parks, Nature, conservation, free to use, no copyright restrictions image - Picryl description

Crown of Thorns Starfish Eating Coral Head

Crown of Thorns Starfish Eating Coral Head

Crown of Thorns starfish eat the outer living part of the coral, leaving the dead white skeletons, usually killing the coral.

Underwater images - Boulder Coral

Underwater images - Boulder Coral

A few corals live to become giants. Some of these are called boulder corals, often yellow or brown in color. These slow-growing corals can be found in all sizes on Samoan reefs. One of the world’s largest is at... More

Underwater images - VIIS_JOHN_150511-138

Underwater images - VIIS_JOHN_150511-138

Public domain photograph of coral reef, underwater life, free to use, no copyright restrictions image - Picryl description

Orange Fin Anemonefish (Amphiprion chrysopterus)

Orange Fin Anemonefish (Amphiprion chrysopterus)

Clownfish are slow swimmers and need the anemone for protection. Scientists have recently disocovered that the clownfish may also benefit the sea anemone by ventilating and circulating water that provides the a... More

Split Shot of Ofu Island - Public Domain image, National Parks Gallery

Split Shot of Ofu Island - Public Domain image, National Parks Gallery

The islands of Ofu and Olosega, sixty miles east of Tutuila and accessed by the airport at Ofu, have scenic beaches with spectacular Sunu’itao Peak and Piumafua Mountain backdrops. These islands have good examp... More

Underwater images - Giant Coral

Underwater images - Giant Coral

Ocean temperatures are rising and giant corals that could be hundreds of years old are in danger of dying off. If the coral dies, the fish die, and populations food supply will no longer exist.

Close up of Crown of Thorns Spines

Close up of Crown of Thorns Spines

Crown of Thorns starfish have a toxic chemical in their spines that are painful for many days if stuck into flesh.

Soft Coral Underwater Landscape

Soft Coral Underwater Landscape

Soft Coral Underwater Landscape Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Underwater images - Giant Clam - Public Domain image, National Parks Gallery

Underwater images - Giant Clam - Public Domain image, National Parks G...

Giant clams need sunlight and inhabit shallow clear waters down to 60 feet. They grow slowly and are a favorite food throughout the South Pacific so divers are lucky to spot them.

Coral Encrusted Historic Anchor

Coral Encrusted Historic Anchor

Biscayne National Park is home to many wrecks. Oftentimes during shipwreck events, the anchors are released, in an attempt to catch the bottom and avoid wrecking on a reef. There are many such anchors in the pa... More

Healthy Stand of Pillar Coral - Public Domain image, National Parks Gallery

Healthy Stand of Pillar Coral - Public Domain image, National Parks Ga...

Healthy Stand of Pillar Coral Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Underwater images - VIIS_Hurricane_150513-144

Underwater images - VIIS_Hurricane_150513-144

Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Underwater images - VIIS_Hurricane_150513-165

Underwater images - VIIS_Hurricane_150513-165

Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Table Top Coral - National Parks Gallery

Table Top Coral - National Parks Gallery

Some corals grow in a shape rather like a table — they have a single stalk, often in the center of the coral, and their top is a big flat disk or table-top. Some may even have multiple layers of table-tops. The... More

Underwater images - VIIS_WATER_150512-124

Underwater images - VIIS_WATER_150512-124

Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Underwater images - VIIS_WATER_150512-131

Underwater images - VIIS_WATER_150512-131

Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Elkhorn Coral, Seafan and Sponge

Elkhorn Coral, Seafan and Sponge

Elkhorn Coral, Seafan and Sponge in Hawksnest Bay, St. John, US Virgin Islands

Underwater images - Waterlemon Cay

Underwater images - Waterlemon Cay

Underwater Landscape, Watermelon Cay, Virgin Island National Park Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Underwater images - Flamingo Tongue

Underwater images - Flamingo Tongue

Flamingo Tongues feed on toxic sea fans and become toxic themselves. The bright skin of the mantel warns predators that they are poisonous, and most will leave these gastropods alone, except the Hogfish.

Effects of Rising Water Temperatures

Effects of Rising Water Temperatures

Above average water temperatures can lead to coral bleaching, disease and death. In additional ocean acidification is a looming threat to this species

Underwater images - VIIS_Hurricane_150513-139

Underwater images - VIIS_Hurricane_150513-139

Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Close up of Staghorn Coral - Public Domain image, National Parks Gallery

Close up of Staghorn Coral - Public Domain image, National Parks Galle...

Close up of Staghorn Coral Public domain photograph of coral reef, underwater life, free to use, no copyright restrictions image - Picryl description

Underwater images - VIIS_Hurricane_150513-155

Underwater images - VIIS_Hurricane_150513-155

Picryl description: Public domain image of a world heritage landmark, natural or regular park, free to use, no copyright restrictions.

Large Stand of Tabletop Coral with Diver

Large Stand of Tabletop Coral with Diver

The Crown of Thorns infestation have devastated some reefs around America Samoa. Thankfully, this spectacular reef remains untouched by the invasive species.

Montipora Coral Head - National Parks Gallery

Montipora Coral Head - National Parks Gallery

Snorkelers are likely to see beautiful scrolling coral heads that are most abundant at shallow depths.

Soft and Hard Corals in the Coral Reef National Monument

Soft and Hard Corals in the Coral Reef National Monument

Virgin Islands Coral Reef National Monument includes federal submerged lands within the 3-mile belt off the island of St. John. These waters support a diverse and complex system of coral reefs and other ecosyst... More

Underwater images - Coral Wall - Public Domain image, National Parks Gallery

Underwater images - Coral Wall - Public Domain image, National Parks G...

Underwater landscape Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Underwater images - VIIS_Hurricane_150513-172

Underwater images - VIIS_Hurricane_150513-172

Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Little Africa Reef - National Parks Gallery

Little Africa Reef - National Parks Gallery

Located just a few yards off the western shore of loggerhead key is a remarkable coral formation aptly named Little Africa because the corals grow in a shape that resembles the continent of Africa when looking ... More

Underwater images - VIIS_JOHN_150511-105

Underwater images - VIIS_JOHN_150511-105

Public domain photograph of underwater diving, free to use, no copyright restrictions image - Picryl description

Elkhorn (Acropora palmata), Yawzi Point, 2010

Elkhorn (Acropora palmata), Yawzi Point, 2010

Yawzi Point is an out-of-the-way spectacular reef that offers the adventurous snorklers deep water, stunning elkhorn, brain and pillar coral, and abundant fish. Always snorkel with a buddy and do not exceed your limits.

Virgin Islands public domain photo - Coral Bleaching

Virgin Islands public domain photo - Coral Bleaching

Scientist have used the analogy of half the Statue of Liberty being gone, when talking about the decline of the Virgin Islands coral reefs. Rising water temperatures brought about devastating coral bleaching ev... More

The park includes both land and sea, National Park of American Samoa, 2013.

The park includes both land and sea, National Park of American Samoa, ...

Located some 2,600 miles southwest of Hawai'i, this is one of the most remote national parks in the United States. You will not find the usual facilities of most national parks. Instead, with a bit of the explo... More

Giant clam, National Park of American Samoa, 2015.

Giant clam, National Park of American Samoa, 2015.

Giant clams ("faisua" in Samoan) are large and colorful because, like corals, they have plant-like cells called Zooxanthellae that live in their tissues and produce free food for the clams. When a clam opens it... More

Underwater life, National Park of American Samoa, 2015.

Underwater life, National Park of American Samoa, 2015.

The national park's natural resources do not end at the shoreline and neither does their commitment to protection! The coral reefs, just off shore, are among the healthiest in the Indo-Pacific region.

Diverse species call the monument home, Virgin Islands Coral Reef National Monument, 2015.

Diverse species call the monument home, Virgin Islands Coral Reef Nati...

Virgin Islands Coral Reef NM includes federal submerged lands within the 3-mile belt off the island of St. John. These waters support a diverse and complex system of coral reefs and other ecosystems such as sho... More

Diverse species call the monument home, Virgin Islands Coral Reef National Monument, 2015.

Diverse species call the monument home, Virgin Islands Coral Reef Nati...

Virgin Islands Coral Reef NM includes federal submerged lands within the 3-mile belt off the island of St. John. These waters support a diverse and complex system of coral reefs and other ecosystems such as sho... More

Diverse species call the monument home, Virgin Islands Coral Reef National Monument, 2015.

Diverse species call the monument home, Virgin Islands Coral Reef Nati...

Virgin Islands Coral Reef NM includes federal submerged lands within the 3-mile belt off the island of St. John. These waters support a diverse and complex system of coral reefs and other ecosystems such as sho... More

Diverse species call the monument home, Virgin Islands Coral Reef National Monument, 2015.

Diverse species call the monument home, Virgin Islands Coral Reef Nati...

Virgin Islands Coral Reef NM includes federal submerged lands within the 3-mile belt off the island of St. John. These waters support a diverse and complex system of coral reefs and other ecosystems such as sho... More

Montipora Coral Head - National Parks Gallery

Montipora Coral Head - National Parks Gallery

Montipora coral is classified as vulnerable (VU) on the IUCN Red List of threatened species, a comprehensive information sources on the global conservation status of animals and plants. Increasing water tempera... More

A person swimming in the ocean with a surfboard. Scuba diving scuba diving, sports.

A person swimming in the ocean with a surfboard. Scuba diving scuba di...

A diver swims over a coral reef / Scuba divers swim over a coral reef / Public domain stock photo of a sea, nature.

A fish that is laying on the ground. Filefish fish underwater, sports.

A fish that is laying on the ground. Filefish fish underwater, sports.

A sea lionfish in the ocean / A fish that is laying on the ground / Animals public domain photography.

A group of fish swimming in the ocean. Fish underwater water

A group of fish swimming in the ocean. Fish underwater water

Aquarium fish. Free images of fish. Use free photos of fish without any copyright restrictions.

A light bulb sitting on top of a lush green field. Light bulb fish

A light bulb sitting on top of a lush green field. Light bulb fish

Fish in a light bulb. A light bulb with a fish inside of it. Public domain stock photo related to nature.

A fish with its mouth open on the ocean floor. Angler diving fish

A fish with its mouth open on the ocean floor. Angler diving fish

A sea shell with a white shell on the ground / A fish with its mouth open on the ocean floor / Animals public domain photography.

A fish tank filled with lots of different types of fish. Anemone aquarium art.

A fish tank filled with lots of different types of fish. Anemone aquar...

Aquarium fish. Free images of fish. Use free photos of fish without any copyright restrictions.

A coral reef with a variety of different types of corals. Coral underwater photography underwater.

A coral reef with a variety of different types of corals. Coral underw...

A large piece of coral in the ocean / A coral reef in the ocean / Public domain stock photo of a nature. A large piece of coral in the ocean / A coral reef in the ocean / Public domain stock photo of a sea, nature.

A close up of a coral reef with many different types of corals. Coral sea divers

A close up of a coral reef with many different types of corals. Coral ...

A small fish swimming over a coral reef / Corals and other marine life in the coral reef / Public domain stock photo of a sea, nature.

A turtle swimming in the ocean next to a rock. Turtle underwater marine

A turtle swimming in the ocean next to a rock. Turtle underwater marin...

Sea turtle on the coral reef / A turtle swimming in the ocean next to a rock / Animals public domain photography.

A group of yellow fish swimming in the ocean. Coral fish underwater.

A group of yellow fish swimming in the ocean. Coral fish underwater.

A group of yellow fish swimming around a coral reef. A group of yellow fish swimming over a coral reef. Public domain stock photo.

A parrot fish swimming in the ocean with other fish. Rainbow fish underwater.

A parrot fish swimming in the ocean with other fish. Rainbow fish unde...

A colorful fish in the water. A colorful fish swims in the shallows of the ocean. Public domain stock photo.

A close up of a sea anemone in an aquarium. Coral underwater ocean

A close up of a sea anemone in an aquarium. Coral underwater ocean

A close up of a coral with green and blue dots / A close up of an anemone in a tank / Public domain stock photo of a sea, nature.

A close up of a fish in a tank. Coral reef fish, travel vacation.

A close up of a fish in a tank. Coral reef fish, travel vacation.

Aquarium fish. Free images of fish. Use free photos of fish without any copyright restrictions.

A fish tank filled with lots of different types of fish. Coral reef sea blue

A fish tank filled with lots of different types of fish. Coral reef se...

A close up of a fish tank with algae / A blue light is in the water with some plants / Public domain space exploration photo.

A clown fish hiding in a sea anemone. Sea anemone anemone fish

A clown fish hiding in a sea anemone. Sea anemone anemone fish

Clown fish in an anemone in the sea / Clown fish in an aquarium / Public domain stock photo of a food.

A group of small fish on top of a coral. Coral worm sponge.

A group of small fish on top of a coral. Coral worm sponge.

A group of fish swimming on an anemone / A group of small fish on top of a coral / Animals public domain photography.

A group of small blue fish swimming in a coral. Fish coral great barrier reef

A group of small blue fish swimming in a coral. Fish coral great barri...

A school of fish swims over a coral reef / A group of small blue fish swimming in a coral / Animals public domain photography.

A close up view of a sea anemone. Anemone coral sea

A close up view of a sea anemone. Anemone coral sea

Close up of a sea anemone / A close up view of a sea anemone / Animals public domain photography.

A puffer fish swimming in an aquarium. Fish water aquarium.

A puffer fish swimming in an aquarium. Fish water aquarium.

Aquarium fish. Free images of fish. Use free photos of fish without any copyright restrictions.

A close up of a piece of art on a table. Coral sea ancient.

A close up of a piece of art on a table. Coral sea ancient.

Public domain textures and patterns: A coral with a coral textured surface / Corals from the sea.

A close up of a bunch of corals. Coral core aequituberculata.

A close up of a bunch of corals. Coral core aequituberculata.

A coral reef with a lot of fish / A group of corals on a coral reef / Public domain stock photo of a nature.

A close up of a sea anemone in a tank. Coral mollusk underwater

A close up of a sea anemone in a tank. Coral mollusk underwater

A close up of an orange and white anemone / A close up of a pink and white sea anemone / Public domain stock photo of a sea, nature.

An underwater view of a coral reef with algae. Coral underwater reef

An underwater view of a coral reef with algae. Coral underwater reef

Tourism: A large group of corals on a reef. A large coral reef with green algae growing on it. Public domain stock photo.

A fish swimming in the ocean with a lot of fish around it. Diving ocean coral

A fish swimming in the ocean with a lot of fish around it. Diving ocea...

A fish swimming in the ocean / A fish in the ocean / Public domain stock photo of a sea, nature.

A lobster is hiding in a coral reef. Diving ocean coral

A lobster is hiding in a coral reef. Diving ocean coral

Lobster in the coral reef, underwater, animal, animal wildlife hd wallpaper / A lobster is hiding in a coral reef / Animals public domain photography.

A couple of fish that are under a rock. Fish underwater marine

A couple of fish that are under a rock. Fish underwater marine

Two spotted puffer fish hiding in the coral / A couple of fish that are under a rock / Animals public domain photography.

A starfish laying on top of a pile of shells. Starfish wildlife

A starfish laying on top of a pile of shells. Starfish wildlife

Aquarium fish. Free images of fish. Use free photos of fish without any copyright restrictions.

A person in a wetsuit swimming in the ocean. Scuba reef palau, sports.

A person in a wetsuit swimming in the ocean. Scuba reef palau, sports.

A diver swims over a coral reef / A diver in the ocean / Public domain stock photo of a sea, nature.

A black and white photo of a coral reef. Coral underwater photography underwater.

A black and white photo of a coral reef. Coral underwater photography ...

Visual patterns: A black and white photo of corals and corals / A black and white photo of a fish swimming in a coral reef - public domain stock photo.

A coral reef with a variety of hard corals. Coral underwater diving, sports.

A coral reef with a variety of hard corals. Coral underwater diving, s...

Corals are a common sight in the waters of the great barrier reef / Corals are seen on the great barrier reef / Public domain stock photo of a nature.

A group of sea anemons in an aquarium. Tropical reef aquarium.

A group of sea anemons in an aquarium. Tropical reef aquarium.

A close up of a coral reef with a clown fish / Corals and other marine life in the aquarium / Public domain stock photo of a sea, nature.

A group of puffer fish swimming in the ocean. Indonesia underwater coral, sports.

A group of puffer fish swimming in the ocean. Indonesia underwater cor...

A group of fish swimming in the ocean / A group of fish swimming in a coral reef / Public domain stock photo of a sea, nature.

A person in a wetsuit is swimming in the water. Diver palau drop-off

A person in a wetsuit is swimming in the water. Diver palau drop-off

A diver swims through the water / A diver swims through a coral reef / Public domain stock photo of a sea, nature.

A close up of a fish on a sandy surface. Lionfish juvenile macro

A close up of a fish on a sandy surface. Lionfish juvenile macro

A fish on a coral reef / A close up of a fish on a sandy surface / Animals public domain photography.

A close up of a sea anemone in a tank. Anemone fish saltwater, animals.

A close up of a sea anemone in a tank. Anemone fish saltwater, animals...

A close up of a sea anemone / A close up of a sea anemone in a tank / Animals public domain photography.

A group of sea anemons in an aquarium. Anemones coral underwater.

A group of sea anemons in an aquarium. Anemones coral underwater.

A close up of anemone with pink and white tentacles / The sea anemone is a common species of sea anemone / Public domain stock photo of a sea, nature.

A pile of rocks covered in a green net. Sea sponge sponge sea

A pile of rocks covered in a green net. Sea sponge sponge sea

Aquarium fish. Free images of fish. Use free photos of fish without any copyright restrictions.

A close up of a fish in an aquarium. Lionfish aquarium coral

A close up of a fish in an aquarium. Lionfish aquarium coral

Aquarium fish. Free images of fish. Use free photos of fish without any copyright restrictions.

A red sea urchin on a coral reef. Coral hawaii red.

A red sea urchin on a coral reef. Coral hawaii red.

A red starfish surrounded by corals / A red sea urchin surrounded by corals / Public domain stock photo of a nature. A red starfish surrounded by corals / A red sea urchin surrounded by corals / Public domain ... More

A group of fish swimming in the ocean. Butterflyfish panda butterflyfish coral.

A group of fish swimming in the ocean. Butterflyfish panda butterflyfi...

Coral reef fish. Free images of fish. Use free photos of fish without any copyright restrictions.

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