I've had my Chocolate for a little over a month now. The first 2 weeks it was extremely shy and stayed jet black. He is now very comfortable, and a hog, reminds me of an oscar with his glutency, but has remained jet black up until this week. It has been doing some crazy color fluxuations this week, he can turn really light gray and translucant(I can see its spine and organs) his fins and eyes stay crimson red and black so it looks really wild when he does it. The first time I noticed it I was on the phone with my friend, and in mid sentence I was like WTF! he didnt believe me until last night when he came over and watched him do over and over and over in a 10minute period. Is this normal behavior in chocolates or do I have the coolest fish alive (or should I be concerned?)