I have 2 FBTs and the female is the regular grass green and very bright. The possible male one is much darker green and I was wondering if that's normal. He is healthy, eats fine, the orange on his belly is bright so I can't figure out what it is. Could it be from being in the water too much? THey both soak ALL the time-I'd say the majority of the time. When he dries off, he lightens up, but is still dark. I've attached a good side-by-side pic of them to see the difference. Thanks!