Just got some crayfish. Can anyone help me sex them? I provided pics below.?

Any advice is greatly appreciated! There's 2

Anonymous2014-03-01T11:14:24Z

Force them on top of each other, put some crayfish porn on (national geographic best place to start) or use common sense and leave them in a small tank alone.

Grand Master BasserĀ®2014-03-01T15:54:36Z

Honestly, I THINK the one on the left is the female. That white "thing" on the underside of the tail looks like the mechanism that holds the mass of eggs. I could be wrong, of course. I see mud bugs more as food and live bait than pets, so yeah...

rbrgbarterr2014-03-01T11:10:58Z

The brightest color one is the male