So my male leo I have owned for a few months now used to be crazy active, up and down on the glass, making craters in the gravel looking for food, playing with my other rays, and not spooked in the least bit. Within the last 2 months I added a female leo in hopes of future breeding. I don't know if that has anything to do with it considering the female is a bit dominant/aggressive but overall shes playful and not really a danger to anyone. For the last 2?? or more weeks I have noticed the male leo developping and indentation between his eyes, usually a sign of a ray being malnourished. He was always a phenomenal eater, I feed them very well especially since they are still young, and he has always been a great eater from the first half hour I put him into the tank, and has always always been searching for food. Well for the last two weeks he has been sulking in the back corner, not being active at all, and only coming out for about half the feedings. Sometimes he tries to eat, finds a piece of smelt thats too big for him, fights with it for 2-3 minutes and then gives up cuz its too big, whereas there are a ton of pieces small enough for him left. Also, he never had a problem with shrimp and worms, but for teh last week I havent seen him go for any, only smelt the odd time. I'm obviously quite concerned, I have changed the water more frequently since I noticed, I really hope he's not put off by the newish female owning the tank when he did before. Any ideas? Water params are fine.