I  have an aquarium in my living room
What type of animals do you have in the acquarium?  Fish, snakes, etc?
Fish ,its just a moderate aquarium. Not a full aquatic life like the ocean...Lol!
I'm guessing they are more like pets, then, than food for you!  Any brightly colored ones?
Star fish,golden fish, tilapia are the pets like you mentioned
We have tilapia farms here, but that is to eat them.  Is yours some other type of tilapia?
No ,they are familiar ones like the fish pond,some even use its as an aquarium.
Well, apparently tilapia have been established into all kinds of new aquatic habitats.  They must be hearty.