An echinoderm is any deuterostomal animal of the phylum Echinodermata (/ɪˌkaɪnoʊˈdɜːrmətə/), which includes starfish, brittle stars, sea urchins, sand dollars Meer weergeven

Echinoderms evolved from animals with bilateral symmetry. Although adult echinoderms possess pentaradial symmetry, … Meer weergeven

Many echinoderms have great powers of regeneration. Many species routinely autotomize and regenerate arms and viscera. Sea cucumbers often discharge parts of their internal organs if they perceive themselves to be threatened, regenerating … Meer weergeven

Locomotion
Echinoderms primarily use their tube feet to move about, though some sea urchins also use their spines. The tube feet typically have a tip shaped like a suction pad in which a vacuum can be created by contraction … Meer weergeven

The name echinoderm is from Ancient Greek ἐχῖνος (ekhînos) 'hedgehog', and δέρμα (dérma) 'skin'. Echinoderms are bilaterians, … Meer weergeven

Sexual reproduction
Echinoderms become sexually mature after approximately two to three years, depending on the species and the environmental … Meer weergeven

Echinoderms are globally distributed in almost all depths, latitudes and environments in the ocean. Adults are mainly Meer weergeven