I bought a tiger oscar fish from the pet store and he was dark black with red spots/stripes. Before leaving the store he already became a pale gray color. I assumed it was just because he was scared so anyway its been a couple days now since I put him in my tank and he still seems to be a lil more on the pale side, definitely not the color I first saw him as. He's probably about 3 inches in size with another cichlid about 2 inches and they're both in a 10 gallon tank. I don't think he should be stressed but also I've noticed him trying to swim into the glass where it seems to be reflective; as in maybe he's trying to attack himself or something like that. I'm just wondering if he needs more time to return to his dark black color or if he will probably stay this paler color? It's probably been about 3 days since I got him. Thanks!