actually they taste rather good. Are plentiful and considered a pest.
I found once their caught, you need to gut them pretty soon as with most sharks. Unless you do a quick kill, before they get all worked up. This may stop the acid that is released into its tissue. But a simple solution is to generally wash the fillet using lemon juice or salt water. I prefer to fillet the smaller ones, grill over a low flame, coated with some butter and cracked pepper corn add a touch of wassbie, side of wild rice a nice tossed salad and a simple glass of water. after a long day of diving.