Spontaneous occurrence of a synchronous hermaphrodite in the banded killifish,Fundulus diaphanus(Lesueur)

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Abstract
An intersex specimen of the banded killifish,Fundulus diaphanus, was encountered during the analysis of the annual gametogenic cycle of this species. The simultaneous presence of mature spermatozoa and ova suggests that the potential for self‐fertilization existed in this fish. The spontaneous occurrence of this intersex individual, although a rare event, indicates the potential for the development of the synchronous hermaphroditic condition under natural environmental conditions in this normally gonochoristic species.