This goliath grouper sure isn't happy about sharing the waters with us humans. It grumpily swims over to the man spearfishing, intimidates him with a little head butt and then steals the fish he caught. Even worse, he took the guy's gun for a little joy ride. It's like stealing someone's date right in front of them.
I can totally feel the snarl as the bully goliath swims away.