Spearchannel | Spearfishing on Instagram: "Many species in the family Acanthuridae (surgeonfishes, unicornfishes and tangs) have sharp, scalpel-like spines on either side of the base of their tail, which they use as a defense mechanism. In this clip, @captain.coleharrison quickly learned about that particular defense mechanism 😅 - more on what happened below 👇🏼 “Sliced by a Unicorn 🤦🏽‍♂️🦄 A little reminder of how things can go sideways in a hurry because of a silly mistake. I did not secur