Other Free Encyclopedias » Animal Life Resource » Jellyfish, Sponges, and Other Simple Animals » Sea Urchins and Sand Dollars: Echinoidea - Physical Characteristics, Behavior And Reproduction, Sea Urchins, Sand Dollars, And People, Long-spined Sea Urchin (diadema Savignyi): Species Accounts - GEOGRAPHIC RANGE, HABITAT, DIET, CONSERVATION STATUS

Sea Urchins and Sand Dollars: Echinoidea - Pea Urchin (echinocyamus Pusillus): Species Accounts

people live shaped egg

Physical characteristics: Pea urchins are one of the smallest urchins. The tiny egg-shaped shell is only about 0.6 inches (1.5 centimeters) long. These urchins are usually grayish green to bright green and have very short spines, which give the animal a velvety texture.


Geographic range: Pea urchins live in the coastal waters of northern Europe.


Habitat: Pea urchins live buried in gravel and sand.

Diet: Pea urchins eat food particles they find in the sand or gravel.

Behavior and reproduction: Scientists know little about how pea urchins behave. These urchins release eggs and sperm into the water, Pea urchins are one of the smallest urchins. The tiny egg-shaped shell is only about 0.6 inches (1.5 centimeters) long. This one is living among the spines of a red heart urchin. (© Andrew J. Martinez/SeaPics.com) where they unite and develop into free-living larvae, which transform into young urchins that grow into adults.


Pea urchins and people: Pea urchins have no known importance to people.


Conservation status: Pea urchins are not considered threatened or endangered. ∎

Sea Urchins and Sand Dollars: Echinoidea - Western Sand Dollar (dendraster Excentricus): Species Accounts [next] [back] Sea Urchins and Sand Dollars: Echinoidea - Long-spined Sea Urchin (diadema Savignyi): Species Accounts

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