Pointdexter

Pointdexter (known as Puff in Japan) is an underwater badnik from the game Sonic the Hedgehog 3 that resembles a puffer fish. It appears in Hydrocity Zone underwater, and will occasionally puff its spikes out. It can be easily destroyed when its spikes are retracted, but when they are out any attack will damage the player instead. In Sonic 3D Blast a similar spike fish that has no name appear at Spring Stadium Zone and Gene Gadget Zone. It's attack pattern is similar to that of Bubbles.

Sonic the Comic
Pointdexters appeared in several issues of the British publication Sonic the Comic, after Doctor Ivo Robotnik's discovery of the Floating Island. In this continuity, they are able to float through the air, like the Bubbles badniks from Sonic 3's Marble Garden Zone. (In their first appearance in the comic, Pointdexter actually appeared in the Marble Garden Zone. )

Trivia

 * In Sonic Advance a Badnik named Senbon is similar to Pointdexter.
 * Pointdexter is similar to Bubbles, a Badnik who appeared in the same game.