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Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. Gill Sac â Outer Duct from Sac Common Opening of Branchial
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Nudibranch - Goniobranchus coi [before Chromodoris coi]. The two pink sausage shaped structures by the gill are the eggs sacs of a parasitic copepod Stock Photo - Alamy
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