Female trout have larger pectoral fins…that one’s easy!
When you take it out of the water… if it’s mouth is closed, it’s a male; if it’s mouth is open, it’s a female.
The females go for the flashier flies
What have I done? My brother always told me the people on this forum were a wealth of knowledge. Next time I catch a trout, I’m gonna probe and study it more than the aliens did my cousin.
It’s hard to tell before they are sexually mature but here is a photo that may help a little. These are two brook trout, caught in the same water, same time…similar in size.
The female on the left has a shorter snout and upper jaw line then the fish on the right. The male has a longer face, with a slightly more streamline look to it.
hmmm… I don’t like the new way photos are handled on here. I guess you’ll have to click “attachment whatever” .
I cannot resist the one those of us who have worked with oysters have routinely been asked:
Neophyte:“Can you tell the sex of an oyster?”
Biologist: “Yes”.
Neophyte: “How?”
Biologist hands an oyster in-the-shell to the Neophyte and tells them to hold it to one of their ears and shake it.
Neophyte does as told.
Biologist asks: “Did you hear anything?”
Neophyte: “No.”
Biologist: “It’s a female!”
Neophyte: “How do you know?”
Biologist: “If it was a male you would hear it’s n–s rattle!”
Works every time!
Cheers!