Blacktip sharks are very edible. I usually keep the small ones (4ft. or less) and as soon as I catch one that I plan to keep for a meal: Cut the head and tail off and slit the belly open. Get all of the blood out of the carcass by washing it out in the saltwater and then put the carcass in a cooler with plenty of ice to cover the meat. When you get home take the carcass out of the cooler and (leave the skin on) cut the meat up into 2 inch thick steaks. Soak the steaks in a bucket of ice and water with one OUNCE of lemon juice for every POUND of shark steak. The lemon juice helps release the blood out of the meat which is very important to get the amonia (urine) odor out of the meat. Let the steaks sit overnight soaking in the ice water/lemon juice. When ready to cook them, take the steaks out of the bucket, rinse the steaks in fresh, clean water, and put them on a tray to dry the meat off. Rub a little bit of butter, black pepper and garlic salt into the meat. Throw the steaks on a nice hot grill and watch the steaks cook. As the meat becomes whiter in color flip them over on the other side, when you can peel the skin off of the meat with a fork the meat is done. ENJOY!