opisthobranch Definition

gastropods, mollusc, molluscs, mollusks, inferobranchian, bubble shell, neritid, sea snail, pholad, moon shell, seasnail, boat shell, sea hare, tooth shell, operculate, genus nerita, belemnoid, stromboid, urochordate, ark shell, whale louse, phoronid, pulmonate, crustacean, mollusk genus, malacostracan crustacean, anthozoan, phyllopod, mollusk family, solenacean, lernean, tusk shell, molluscoid, sea pen, cetaceous, beach flea, nudibranch, buccinoid, butterfly fish, hippurite, mesotrochal, cirriped, macruran, pseudocoelomate, testaceology, conchiferous, bivalve, crustaceology, sporosac, branchiopod crustacean, right whale, combtooth blenny, sea moss, sea slug, pogonophoran, baculite, turbite, invertebrate, odontocete, spoutfish, genus pecten, pteropod, sea mouse, pinnothere, scyllarian, pearlfish, heterostracan, pectinibranchiate, trochosphere, hippocrepian, european spider crab, crustaceologist, brittle star, abdominalia, univalve, scorpaenoidea, pomacentrid, myaceae, sea lemon, nektonic, coelenterate genus, peridiniidae, anaptychus, onychophoran, lamellibranchiate, scopeloid, sea trumpet, basket star, spider crab, homaridae, nodosarine, scorpaenoid, labroid, rissoid, suprabranchial, sea mat, scaroid, sea chub, ascidian, water flea,