So, recently I decided I wanted to get a tropical aquarium for my room, so I'll probably be getting it for my birthday. One of my neighbors has a small shark type thing in his aquarium, it's really cute but his is freshwater. I can't find any sites that will help me, but basically I just want to know if there are saltwater sharks small enough for a fish tank that will go in my room, and what they eat and how long they live. Also, if anyone knows how long yellow saltwater puffers (I don't know what they're actually called, sorreh) live, and what they eat, I hope you'll tell me. Thankies.