Assertion: sea urchin | /r/HasProperty | echinoderm
Facets:
Source sentences:
text: Sea urchins are echinoderms (phylum Echinodermata), which also includes starfish, sea cucumbers, Brittle-stars, and crinoids.
text: The sea urchin is a small, spiny little sea creature called an echinoderm, part of the class Echinoidea, of which there are more than 940 species worldwide.
text: Sea Urchins are echinoderms, related to starfish, sea cucumbers and brittlestars.
text: Sea urchins are echinoderms (Greek for spiny skin), marine animals that originated over 540 million years ago and that include starfish, brittle stars, sea lilies, and sea cucumbers.
text: Sea urchins are echinoderms, related to sea stars and sea cucumbers.