hilarious to us fish geeks

[niloc16]

i just came back from vegas and we went to rainforest cafe in MGM. i was waiting in line for a table and i was watching this guy for about 5 minutes. sorry i dont know what type it is, but he sat at the bottom of the tank and stared at these bubbles coming up. when the other fish breached his border he would chase them away aggressively and then hurry back to his spot to watch again. i was laughin my head off and most of the people looked at me and wondered whats his issue. my wife was laughing too but only us fish geeks would understand.