Porcupine puffer fish
The Porcupine Puffer Fish is a very interesting fish. It can be black, tan, or yellow and has spiny appendages on it's back. The Porcupine Puffer Fish is semi-aggressive and it's appetite consists of squid, krill, clams, and hard-shelled shrimp. It is 1 to 5 inches long and inflates to twice it's size when threatened or scared. As you can see the Porcupine Puffer Fish is very cool.