The Dallas aquarium is the only one Ive ever been to and some things are really awesome, while others are lacking. They have a MASSIVE FW
tank that holds two manatee as well as catfish, several common plecos and other "native" fish. It also has a few "random" species only tanks (large octopus, puffers, sting rays, jellyfish, and giant crabs from hell) but I wasn't terribly impressed by their salt water tanks. The attraction is probably more for the otters, manatee, while aligator etc than it is for the SW
tanks because the SW
tanks reminded me more of doctors office tanks than anything else.