Porcupinefish
Nombres alternativos: Blowfish, Balloonfish, Globefish, Diodontidae
The Porcupinefish in a medium size fish unique for its ability to inflate itself like a balloon twice as big as its original size. When inflated they have hundreds of sharp spines that stand out in order to keep predators away.
Even though these fishes are deadly for humans if eaten, there are still some dangerous species who are considered a delicacy in Asian countries.