Jaws first appeared during one of Sonic the Hedgehog's fishing trips, where it ate Sonic's pole and the dock, forcing Sonic to investigate. He found a cave with an underwater Roboticizer, and was almost caught himself. Jaws lured Sonic into a trap, and tried to load Sonic into the robotcizer, when Sonic shredded the net, wasting his air. Jaws would have bitten Sonic had Rotor and Tails not arrived in their bathysphere, and torpedoed Jaws, creating air bubbles for Sonic, allowing to trash the roboticizer. Jaws fled, but his tail rotor was damaged, and he spent some time crashing into undersea stalagmites. He was repaired and returned to the cave where he had to guard an emerald, only to be distracted by another fight with Sonic and Tails. This fight ended when Jaws attacked a crude sketch of Sonic and Tails, crashing into the cave wall. As if that weren't embarrassing enough, Jaws knew that the real Sonic and Tails have five fingers, while the sketch gave them four. (OSM: #1, #2)
He was later seen working with Coconuts is an undersea bank heist, with predictable results. He later ruined Robotnik's impersonation of The Wizard of Oz and warned Robotnik about what would happen if the law learned that Robotnik had stolen some fan mail meant for Sonic-Grams. By then, Jaws was reduced to the role of a mere pet in a fishbowl, looking at photos of Sonic-fans like Amy Rose, while his job of guarding undersea roboticizers was replaced by Octobot. (StH: #16, #25, STT)
He was later seen on the Island of Misfit Badniks, unable to participate in the battle with Sonic, s he could not do much inside a fishbowl. He just watched as Sonic and Pseudo Sonic sunk the island. When the Badniks tried to enlarge Pseudo Sonic, and the Forty Fathom Freedom Fighters interferes, Jaws joined the last wave of badniks led by Caterkiller in battle. He tried unsuccessfully to eat P.B. Jellyfish, as Pseudo Sonic woke up and knocked everyone away. Big Fluke smahed Pseudo Sonic and all badniks, Jaws included, into a cube, along with the island. (StH: #170, #185)
Jaws has jaws poweful enough to tear through wood, and has great speeds underwater. Unsurprisingly, it is useless out of the water, requiring the use of a fishbowl to appear on land.
Jaws is based on the like-named badnik (known as "Puku-puku" in Japan) from the Labyrinth Zone in Sonic the Hedgehog, both Genesis and Game Gear, also appearing in the third act of the Scrap Brain Zone (Genesis only). Like many badniks, the only difference between Jaws and his game counterparts is the color. (Its purple with a yellow jaw in the Genesis version and blue-grey in the Game Gear Version.) It should not be confused with another piranha-based badnik, known as Chopper ("Bata-bata" in Japan) which was shaped like a piranha, had no propeller, hops in and out of the water in Green Hill Zone (Genesis and Game Gear and Dreamcast/Gamecube (Sonic Adventure 2) versions), Bridge Zone, and Jungle Zone (Game Gear only) and has yet to appear in the comic. Curiously, in the comic, Jaws had a color scheme that resembled what Chopper had in the games. Perhaps, nobody wanted to confuse the fish-bots.