The animals on earth don't need a certin role they just wan't to make a living
a powder blue tang is a saltwater fish, it is also known as a powder blue surgeon fish. if you have seen Finding Nemo, this fish is the same thing as Dori. Actually dori is called a hippo or blue tang, and is not at all the same as a powder blue tang.
The blue tang, either Pacific (Regal), Atlantic, or Powder, do help the environment by consuming algae.
None of the tangs commonly called Blue Tang - Powder Blue, Atlantic Blue, and Regal/Hippo/Blue(Paracanthurus hepatus - are on the endangered species list. So the answer is never.
they survive with the temperature of water
There are many surgeon fish, angels, and blennies that make their home off the coast of Hawaii. The most popular two are the Yellow Tang, and the Blue Hippo Tang
There are two species, in two different genera, called "blue tang." The Atlantic blue tang is in the genus Acanthurus (species, Acanthurus coeruleus). The blue tang native to the Pacific and Indian Oceans is in the genus Paracanthurus (species Paracanthurus hepatus). This is the one that is more popular as a marine aquarium fish. It is also called the regal tang, blue surgeonfish, hippo tang, palette surgeonfish, or flagtail surgeonfish. Both of these blue tangs are in the family Acanthuridae, the surgeonfishes. For more information: http://en.wikipedia.org/wiki/Acanthuridae http://en.wikipedia.org/wiki/Acanthurus_coeruleus http://en.wikipedia.org/wiki/Paracanthurus_hepatus
Dory is a Blue Tang fish.See Related Links below for a real blue tang fish.
The forgetful companion is actually companion to Nemo's father, Marlin, while he is searching for Nemo. Marlin meets up with a fish named DORY who has problems with short-term memory. Dory is a Paracanthurus hepatus which is a species of Indo-Pacific surgeonfish. A number of common names are attributed to the species, including regal tang, palette surgeonfish, blue tang (leading to confusion with the Atlantic Acanthurus coeruleus), royal blue tang, hippo tang, flagtail surgeonfish, pacific regal blue tang and blue surgeonfish.
it is said in some websites that it is 5 and in others that it is 20 or more but they are also talking about the blue tang with a tank life not out on th reef. So it is really unknown. ** I've had my Blue Tang(Hippo Tang) for 11 years in a 55 gallon aquarium. I bought it as a juvenile (about the size of a silver dollar). Now it's about 7 inches long and doing great.
Powder blue tang, Regal tang, Yellow tang, Neon Goby, Blue cheeked Goby, Coral Beauty, Flame Angelfish, Clownfish, Pufferfish, Mandarine, Chalk Bass, and many more. Improved: Some of the most popular fish are False Percula Clownfish, Yellow Watchman Goby, Blue Hippo Tang, Yellow Tang, Flame Angelfish, Coral Beauty Angelfish, Clown Goby. Green Mandarin Goby, Diamond Watchman Goby, Pufferfish, Royal Gramma and Lawnmower Blenny
The Blue Tang changes colors as it matures.
The Blue Tang does not migrate. It lives on the reefs and eats algae.