Cardinal soldierfish are shy, only venturing out from their hiding spots at night. In the western Atlantic Ocean, Caribbean Sea and Gulf of Mexico, cardinal soldierfish inhabit reef colonies, rocky ...

The arrow crab can grow to 2.4 inches (6 centimeters) in length. Arrow crabs have abnormally long spider-like legs and a pointy head. Their bodies are yellow-brown in color with white and brown ...

This species of jellyfish isn't efficient at migrating on their own. They rely heavily on water currents and wind to get from one location to another. In the coastal waters of the north Atlantic, ...

Every individual in this species begins as a male. As they mature, some will morph into females. Hawaiian cleaner shrimp yellow bodies with red and white striping on their topside. They also have a ...

The green reef crab originated in the Caribbean. Green reef crabs can be found in the western Atlantic Ocean, Gulf of Mexico and Caribbean Sea inhabiting coral reef communities and rocky areas. The ...

On average, these fish grow to 3 inches (8 centimeters) long. Royal grammas are small fish with purple and yellow split coloring. They have a small black bar running through their eyes and a black dot ...

When these snails are ready to spawn, they'll settle themselves on high rocks and begin the external fertilization of released eggs. Shaped like a spiral cone, lightfoot snails can range from orange ...

This anemone secretes a toxin that can be harmful to humans. Using its polyp tentacles, mat anemones will catch and eat smaller marine organisms that drift by. They also have a special algae—called ...

According to the fossil record, deep sea isopods were thought to have existed before Pangea disbanded. This means they're over 160 million years old! Deep sea isopods eat animals, both dead and alive, ...

In the northern Pacific Ocean, GPOs live in water as deep as 4,900 feet (1,500 meters). Occasionally, they can be found in shallow tide pools. Giant Pacific octopuses, or GPOs, as they are known at ...

This coral species can survive in deeper, lower light environments. Knobby candelabrum have fuzzy, bushy, cylindrical branches that grow from a single base. This coral can be beige, brown, purple or ...

Caribbean reef octopuses eat clams, snails, crabs, lobsters and occasionally members of the same species. Caribbean reef octopuses have white bodies with an orange and brown vein-like pattern from ...