Reversed Asymmetry in Laboratory-Reared Summer Flounder

Abstract

Abstract Eggs from laboratory-spawned summer flounder (Paralichthys dentatus) were hatched, and larvae were reared through metamorphosis in captivity. The incidence of juveniles showing a reversed asymmetry under these conditions was high – 4.4% of fish that completed metamorphosis – given that only two cases of reversal in this species have been reported previously. The importance of directionality of ocular asymmetry in flatfishes is addressed.