Comic book character, owned and published by Marvel Comics. He was created by Kelly Thompson and Daniele di Nicuolo. He made his first appearance in 2018's West Coast Avengers #6, but got his formal introduction and name in the next issue.
Jeff is a baby landshark. He has four legs, he can get along fine on land or underwater, he's got sharp, intimidating teeth, and he's very, very cute.
In the first issue of the 2018 edition of "West Coast Avengers," the giant-headed, tiny-armed supervillain M.O.D.O.K. unleashed a horde of landsharks on Santa Monica, California. When the L.A.-based superteam foiled the attack, one of the sharks, a very round and adorable baby, was adopted by Gwenpool. Jeff's ownership has bounced from Gwenpool to Deadpool to Kate Bishop, though he's generally been a supporting character, at least as far as superhero action goes.
In September 2021, Jeff got his own series: "It's Jeff!" It was written by Thompson
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