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a sea fan grows over dead coral
Photo

Waving Sea Fans

Sea fans—softer-bodied coral relatives—colonizing a dead stony coral framework. ...
Coral showing signs of disease
Photo

Disease Takes Hold

The white splotches are lesions of infected coral. ...
coral polyps
Photo

Healthy Coral Polyps

Healthy coral is colorful. The entire coral is actually a colony of many little...
A soft, yellow coral
Photo

Soft Coral

Most “typical” warm water corals found in shallow waters that most people...
Diagram of narwhal anatomy and tusk function
Photo

Narwhal Anatomy

The small larvae of elkhorn coral (Acropora palmata) settle and grow on the crustose coralline algae species Hydrolithon boergesenii.
Photo

Coral Larvae Settling

The small larvae of elkhorn coral (Acropora palmata) settle and grow on the...
Tiny sponge spicules.
Photo

Sparkling Sponge Spicules

These sparkling sponge spicules are microscopic needle-like structures that many...
Corallimorpharian
Photo

Soft Coral Close-Up

These neon balloons weren't blown up for a party: they are the colorful tentacles...
In the X-ray image of this Viper Moray Eel (Enchelynassa canina), note the second set of jaws in the “throat”; these are the gill arches, which are present in all fish.
Photo

X-Ray Image of a Viper Moray Eel

In the X-ray image of this Viper Moray Eel (Enchelynassa canina), note the second...
A pearly razorfish
Photo

Pearly Razorfish

The pearly razorfish’s name may be slightly misleading since it is neither as...
A beluga whale
Photo

Baby Beluga

Beluga whales are naturally vocal animals. They are often called “canaries of the...
In some reefs, small fishes such as this broad-barred goby protect corals by eating invading seaweeds.
Photo

Coral Goby Cleans Coral

One of the first signs of a sick coral reef is seaweed creeping across...

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