Assertion: sea urchin's organ | /r/HasProperty | aristotle’s lantern
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text: Adult body round, disklike, Sea Urchin Animal or heart shaped, showing 5-sided symmetry, colors varied, often black, green, gray, or brown; head and brain lacking, 5 paired rows of tube feet bearing suckers at tips; calcareous skeleton set in body wall (the test); Sea Urchin Animal test is usually rigid and bears mobile spines and minute grooming organs (pedicellariae) that may be venomous; many species have chewing organ (Aristotle’s lantern) and teeth; long gut opens via mouth on underside and via anus on upper side of body