[matesz H2O]

ok so my experience is that you shoot fish and then i take my dive knife and stab the head to kill it do i do the same with the shark or is it better to shoot the head, will the spear penetrate the skull. let me know how do you go about shooting it. also if you have any experience shooting stink rays or sand rays how do you go about that do they have alot of power i was going to but i wasnt sure if it was legal and i was alittle scared it would pull me through the water. i know that sting ray tastes really good cuz i cought it on a fishing line once befor but how does spearing one work? easy or not?