A generic fishing hook. You won't be able to fish without one.
Magnetic Hook
It vastly improves the chances of catching things other than fish.
Shiny Lure Hook
It's used to attract shiny-loving fish and make them easier to catch.
Weighted Hook
It reduces the bounce that happens when you hit the boundaries of the minigame bar.
Rescue Hook
A hook used to rescue bodies whom have fallen into chasms. You won't catch fish with it, nor it can't be used for fishing outside of chasms, though it can still be used to reel in people and items from unreachable locations..
Bone Hook
A generic fishing hook carved out of sharpened bone. Bone fishing rods come pre-equipped with it.
Gyro-Stabilized Hook
It allows you to move both up (left-click) and down (right-click) during the minigame while negating gravity. It requires the Advanced Fishing Technology Node to be researched to be printed.
Jawed Hook
A beartrap-looking hook that makes losing the fishing minigame impossible (Unless you drop the rod or get stunned). However it'll hurt the fish and eventually kill it. Funnily enough, you can snag in people with it too. It won't hurt them like a actual beartrap, but it'll still slow them down. It has to be bought from the black market uplink.