Echinocyamus pusillus Muller, 1776.
OTHER COMMON NAMES
English: Dwarf sea urchin.
Among one of the smallest urchins, its tiny oval test measures up to a maximum 0.6 in (1.5 cm) in length. Usually gray-green to bright green in color with very short spines, which give the animal a velvet texture to touch.
European coastal waters to a depth of 165 ft (50 m). HABITAT
Lives buried in coarse gravel, sandy sediment, and among Zos-teria and maerl beds.
H Echinocyamus pusillus H Echinostrephus aciculatus H Dendraster excentricus
FEEDING ECOLOGY AND DIET
Primarily deposit feeder, but also preys on foraminiferans and grazes on individual sediment grains for its organic coating.
CONSERVATION STATUS Not listed by the IUCN.
SIGNIFICANCE TO HUMANS
Selected by beachcombers for their aesthetic value. ♦
Sexual reproduction. Sexes are separate. Eggs and sperm are shed into the water column, where they are fertilized and develop into free-living larvae.
Not listed by the IUCN.
SIGNIFICANCE TO HUMANS None known. ♦
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