Fatman-
may I call you fatman? Get yourself a knife. or Long Nail. When Dispatching fish do it from the top of their head, in the middle just past the eyes. Also, You may want to look into fishing regulations for your area. I know in the states, There are certain fish you can and cannot spear. Some areas don't allow spearing AT ALL. Learn what type of fish you can spear and their anatomy. Might help locate their brian. You can also dispatch fish by getting their spine. I'm sure others will chime in. Happy Hunting! Dive Safe.
Oh, Congrats on spearing your first fish!
