Sea Urchins and Sand Dollars: Echinoidea - Pea Urchin (echinocyamus Pusillus): Species Accounts
Animal Life ResourceJellyfish, Sponges, and Other Simple AnimalsSea 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
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, 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
- Sea Urchins and Sand Dollars: Echinoidea - Long-spined Sea Urchin (diadema Savignyi): Species Accounts
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