- Theyeatotherfish,crustaceans,mollusks,andoctopus.typegenusofthefamilyTriopidae:smallcrustaceanswithasmallthirdmedianeye.ThisanimalUSESitstoothy"saw"tosenseburiedcrustaceansorbottom-dwellingfish,andtostunandkillthem.Thedeepseatypicallyhasasparsefaun...
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