Jesus dude, chill the hell out!

[CClump]

Sounds like my buttikoferi, just a complete bastard, terrorizes everything in the tank until they eventually die.
You said its blue with horizontal stripes? If they are vertical this could be the same kind of fish.

im pretty sure unless you have a special one that the only blue on a butti ever is around the lips. Stripes are black and white/yellow
the ones ive been around dont really start getting aggressive until larger