Jeff the Land Shark is a relatively new character in the Marvel Comics universe, but he has quickly gained popularity due to his adorable appearance and charming antics. Here are some of his most notable story arcs:

1. West Coast Avengers (2018-2019): Jeff the Land Shark made his debut in this series, created by Kelly Thompson and Daniele Di Nicuolo. He was introduced as a pet for Gwenpool and quickly became a fan favorite due to his cute and quirky nature. The series follows the adventures of a new team of Avengers based in Los Angeles, and Jeff adds a unique and humorous element to the team dynamics.

2. Deadpool (2019-2021): Jeff became a companion to Deadpool in the series written by Kelly Thompson. Deadpool takes on the role of King of the Monsters, and Jeff accompanies him on various escapades. This series showcases Jeff's loyalty and his ability to hold his own in the chaotic world of Deadpool.

3. It's Jeff! (2021): This is a series of digital comics on Marvel Unlimited, focusing solely on Jeff the Land Shark. Written by Kelly Thompson with art by Gurihiru, these short stories highlight Jeff's adorable misadventures, capturing his playful spirit and the light-hearted side of the Marvel Universe.

These arcs have helped solidify Jeff the Land Shark as a beloved character, appealing to fans of all ages with his endearing personality and comedic presence.