After an incident left several, including Jeff, briefly de-aged, he ended up with Elsa Bloodstone, who promised to always take care of him; however, Gwen transported Jeff to Gwenpool's Island, where he stayed in her viewing box with her friends instead of being forced to fight. He then watched as Gwenpool fought and defeated the Hulk.
- Jeff was likely created by B.R.O.D.O.K. along with all the other Land Sharks that attacked Santa Monica.
- Jeff was named after Gwen's kitten.
- Jeff took an immense liking to Quentin Quire, Gwen's boyfriend when Jeff was discovered.
- The Kaiju-like monster known as Smash Smash seemingly had a crush on Jeff.
- 18 appearance(s) of Jeffrey (Land Shark) (Earth-616)
- 5 minor appearance(s) of Jeffrey (Land Shark) (Earth-616)
- 3 mention(s) of Jeffrey (Land Shark) (Earth-616)
- 14 image(s) of Jeffrey (Land Shark) (Earth-616)