Anatomy of a circular hook. Transcriped from Te Matau a Māui by Chris Paulin and Mark FenwickHow a circular hook works. A: Fish approaches hook. B: Fish chomps on hook to get at bait. C: Either from the fish swimming away or the fisherman gently tugging, the hook rotates in the mouth. D: Further tension sets the hook so the jaw is caught in the gap. Transcriped from Te Matau a Māui by Chris Paulin and Mark Fenwick