Abstract
A closely associated set of characteristics was identified in adult cocktail wrasse Pteragogus aurigarius, collected in a coastal area on Cheju Island, Korea in 1993, which showed sexually dimorphic growth. Growth was positively allometric in males. Male cocktail wrasse possess larger first and second spinal rays in the dorsal fin than females resulting in pronounced sexual dimorphism. Such sexual dimorphism may reflect the outcome of sexual selection in this species.
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