The Map Puffer can inflate its body to twice its size and is poisonous to predators if swallowed. Their fused beak-like teeth are strong and are used to eat sessile inverts like feeder clams. best kept in a tank with plenty of live rock they have a propensity to eat almost anything in the tank including small fish, inverts, and sometimes even aquarium equipment, so be cautious when picking tank mates, you should never use a net to move the Map Puffer as they may expand and injure themselves - use a container instead,  like other puffers, should never be exposed to open air