Sex of Mussel Mytilus coruscus (Bivalvia: Mytilidae) : Sequential Hermaphroditism

Samples were collected from the subtidal region of Jumunjin on the eastern coast of Korea in July 2020.A total of 338 mussels of shell height (SH) 20.8-149.8mm were used for sex ratio analysis.The sex ratio (F:M) in the same population of mussel Mytilus coruscus was approximately 1:0.7.The sex ratio according to the class of SH was different.The sex reversal pattern of M. coruscus appears to go from male → female → male → female, and as such is determined to be sequential hermaphrodites.