Become extremely aggressive!

[Lordsameth]

My Male, Biscotti has been showing increased aggression in the past week. Yesterday he jumped to bite and then clung on like he seriously wanted to kill the person. Today I came up to the tank, and he took a run at the side, biting and smacking himself into it. He doesn't flare prior to attacks. If I have my hand in there to move a plant or for cleaning, he will bite repeatedly until I leave his space...

He wasn't like this before, is this a sign of sickness or is it alright for him to be this aggressive?

[dramaqueen]

He sounds like a little shark. lol

[ChicagoPete]

Hes EVIL i teLL you PURE EVIL!!!! Lol!

[DragonFish]

Lol, he sounds like a real little fighter...They certainly don't call them "Fighting Fish" for nothing!
Don't worry, its nothing to be concerned about. Its just his personality.

[Lordsameth]

Well, the bubble nest I woke up to is a sure sign he isn't stressed. It was his biggest ever since I slowed his filter yesterday. He seems thankful.