i have a sailfin molly that i've had for a month or so. he eats well, but seems to be losing weight. his wife died a week ago - same thing, just started losing weight. i have a 65 gallon tank with 4 angels, 2 clown loaches, 2 pictus cats, 4 serpae tetras, 4 scissortail rasboras, 1 headlight tetra and 3 mollies. i don't see signs of aggression toward this fish at all - in fact, he is usually the aggressor. i see no signs of injury and his color still looks good. anyone have any ideas?