Blue Unicorn Tang - Sub-adult - IndonesiaNaso brevirostris Tangs are also known as surgeon fish within the industry due to them having a sharp spine that looks similar to a scalpel at the base of their caudal fin (tail). They use this spine as protection against predators, so be sure to use caution when handling. In the wild, adults tend to live singly, so they should not be housed with fish that look similar in shape and colors. Tangs are considered to be peaceful towards most other tank