Shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells.
Any of various orders of the class Echinoidea among the echinoderms. They all have a globular body enclosed with plates of lime and covered with spines. Sometimes the spines are anchoring organs, and they also assist in locomotion. Sea urchins feed on seaweed and the animals frequenting them, and some are edible.
SYN. sea-urchin + prikaži više