Abstract
Captive-bred offspring from a single pair ofAmphiprion frenatus displayed two independent color polymorphisms, one for juvenile stripe pattern and one for adult color. The adult polymorphism encompassed color morphs representingA. frenatus, A. rubrocinctus andA. melanopus. Positive assortative mating occurred, with viable F2 offspring from one pairing. Hybridization has been achieved previously betweenA. melanopus, A. frenatus andA. ephippium, so these four species may be stable polymorphs of a single species, the different morphs selectively maintained in different geographic regions. The extent of polymorphism among marine fishes is poorly understood.
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