Circle hooks can still do damage upon release of fish

Fishing Hooks 101: Parts, Sizes, Types, and More

The Best Sea Fishing Hooks

Catch and Release Fishing - Florida Sea Grant

What happens to a fish hook that is left in the mouth of a fish after it has been caught and released? - Quora

Hooking injuries taking toll on North Platte fishing - WyoFile

Better Fish Circle Hooks For Striped Bass - LBI NJ Fishing Report

Circle Hooks & Stripers: You Have Questions, We Have Answers - The Fisherman

Releasing Your Catch

Circle Hooks & Stripers: You Have Questions, We Have Answers - The Fisherman

What happens to the fish when it breaks the line and the hook stays in the mouth of the fish, and possibly more then just the hook? - Quora