I'd say M due to black scale tipping, and coloration, but opercular tab isn't really that large. My money is on Male.
That is my vote, but ...
... back in 1969, a good friend (friend-girl, not girl friend) took me to see a show in one of San Francisco's better known theatres.
We were both about 22. I was a "squid" going to school at Treasure Island, and she was a local. I knew her because her dad and I were good friends through several hobbies we had in common.
She took me to Finnochoi's. Whoa -- I was impressed, if that is the right word, about the dancers and entertainers. Fantastic show!
At the end of the show, the performers all came out to take a final bow.
Yeesh! All those beauties were guys!
So, I'll reserve judgement on that fish.
May that fish live a happy life, whether a friend of Barney Frank or Hugh Heffner.
