No, he is actually very friendly and comes out whenever someone looks in the tank. He'll follow my finger all around the tank like a dog, its funny. His fins were like that when we bought him and i just figured they were still growing but its been 4 months now and they are still the same. He's in the tank with 3 danios, 3 red minor tetra's, male guaramis, 4 rasbora's. I didn't want him to begin with in the tank with those fish but my girlfriend wanted him and petsmart said it was ok to put him in there just as long as no other male betta's were in there. He stays away from the plants(fake) and likes to hang out in the rock cave but comes out right away when someone is near. He eats like a horse, no fuzz or anything on him, very brilliant colors. The only fish he has a problem with is the male guaramis and i've seen him chase the tetra's once in awhile. It might be coming down to him getting his own tank but it does not appear that bad. Water parameters are fine, right where they're supposed to be.