Assertion: echinoderm's arm | /r/CapableOf | lack sucker
Facets:
Source sentences:
text: sea lilies fewer than 100 species; many have more than five arms; earliest and most primitive echinoderms; live on the ocean floor, mainly in deep water; filter feeders feather star Asteroidea sea stars almost 2000 species; most have five arms; many are brightly colored; live on the ocean floor, mainly in shallow water; predators or scavengers sea star Ophiuroidea brittle stars about 2000 species; central disk distinct from arms; move by flapping their arms, which lack suckers; live on the ocean floor in shallow or deep water; predators, scavengers, deposit feeders, or filter feeders brittle star Echinoidea sea urchins