Research suggests that these urchins can eat other urchins when their preferred foods, such as kelp, are not available. This urchin's test, or protective covering, can grow to 1.6 inches (40 ...

These urchins are harvested for their roe, their reproductive material. The roe is called Uni in Japanese and is served in sushi restaurants. Red sea urchins tend to live in rocky areas, often in ...

The black tegula can carry other mollusks as "hitchhikers!" For example, a type of limpet rides on the black tegula's shell and eats the microscopic algae growing there. These snails can be found from ...

These urchins may decorate themselves with algae and shell bits for protection. The sea otter is one of the main natural predators that eats sea urchins. Because sea otters are endangered, urchins ...

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These minnows will sometimes dig themselves into the sand to escape overly warm or cool water. Sheepshead minnows prefer quiet, shallow water habitats. They can be found in bays, estuaries, creeks, ...

These fish only live to around 5 years of age. Bluespotted sunfish can be found along the Atlantic coast and the Gulf of Mexico inhabiting ponds, rivers and river bends. Bluespotted sunfish are olive ...

Banded sunfish eggs are buoyant, meaning they'll float into the water column after they're laid. Banded sunfish have yellow-tan bodies with five to seven dark vertical bars. They have rounded tail ...

When suckermouth catfish swim in water that's too cold for them, their fins turn red. Suckermouth catfish can be found in quiet, slow moving freshwater environments like swamps, estuaries and rivers.

These snails can inhabit waters as deep as 361 feet (110 meters). These snails can be found in sandy bottom habitats in the Gulf of Mexico, eastern central Pacific Ocean and the western central ...

These fish are commonly used as bait to catch bigger fish. In the western Atlantic and Gulf of Mexico, the Gulf killifish inhabits estuaries and heavily vegetated areas with soft, sandy bottoms. Gulf ...

Kelp rockfish can change their color and markings to blend in with their background. Kelp rockfish inhabit kelp beds and rocky habitats from Timber Cove, California, south to Punta de San Pablo in ...