Ecological animal geography; an authorized, Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage ecologicalanimal00hess Year: 1937 ABYSSAL BENTHAL AND PELAGIAL 257 fishes) have luminescent organs, which are absent in the few coastal forms. Many luminescent cephalopods and fishes maintain themselves in the transition zone between the lighted and the abyssal pelagial. Fig. 67.—Light organs of deep-sea animals: a, of a fish (Argyropelecus affinis); b, of a schizopod crustacean (Nematoscelis mantis); and c, of an octopod (Abraliopsis
Ecological animal geography; an authorized, Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage ecologicalanimal00hess Year: 1937 ABYSSAL BENTHAL AND PELAGIAL 257 fishes) have luminescent organs, which are absent in the few coastal forms. Many luminescent cephalopods and fishes maintain themselves in the transition zone between the lighted and the abyssal pelagial. Fig. 67.—Light organs of deep-sea animals: a, of a fish (Argyropelecus affinis); b, of a schizopod crustacean (Nematoscelis mantis); and c, of an octopod (Abraliopsis morisii). Light cells stippled; reflector lined, backed by a pigmented layer, black. A lens of varying structure in front of the light cells, made up of cells in a, homogeneous in b, fibrillous in c; b, with an afferent nerve, n. lac, lacunae, a after Brauer; b and c after Chun. What may be the function of this bioluminescence? The attraction of prey must be considered as the primary possibility in the benthic
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