The Tank Gang from Finding Nemo includes the following common aquarium fish:
Coral, Marlin, and Nemo = Ocellaris or False Percula Clownfish, Clown Anemonefish
In a home aquarium, clownfish are much easier to take care of than the anemones! The anemones demand high water quality and specific lighting. Clownfish, in pairs, can live fine without a live anemone in their tank.
Gill = Moorish Idol
Moorish idols are very hard to keep in captivity, please leave them to the experts to take care of.
Bubbles = Yellow tang
Yellow Tangs are herbivores, and in an aquarium can lose their bright yellow color if their diet does not include enough plant matter.
Bloat = Porcupine Pufferfish, Porcupinefish
Pufferfish fill themselves up with water to puff up, not with air (except in an emergency) like Bloat in the movie. There is enough tetrodotoxin in one pufferfish to kill up to 30 adult humans, and there is no known antidote!
Gurgle = Royal Gramma, Fairy Basslet
Royal Gramma really are purple and yellow like Gurgle! In a home aquarium, Royal Gramma are peaceful, hardy, and eat readily. In the wild they eat plankton and are cleaner fish.
Deb/Flo = Black and White Damselfish
Deb is based on a real damselfish with black and white coloration, not blue and white like her. As in the movie, all residents of aquarium tanks can see out (I have SCUBA dived in public aquarium tanks and can attest to that!), as well as see their own reflection at certain angles. Many fish in home aquariums recognize the person(s) that feeds them!
Jacques = Pacific Cleaner Shrimp, Skunk Cleaner Shrimp, Scarlet Cleaner Shrimp
A cleaner shrimp is omnivorous, which means it eats both plant and animal matter. A cleaner shrimp does clean other fish at cleaning stations in the wild, but will also scavenge for food.
Peach = Sea star
Sea stars, or starfish are scavengers. They do not have eyes like Peach, but very simple eyes at the end of each arm that sense light and dark. Sea stars do have a mouth under their body like Peach. A sea star can regenerate a leg if it is cut or bit off!