You can catch sharks at harpoon fishing spots ( hidden under net fishing spots ) these can be located at: Fishing Guild, Catherby and Relekka.
about level 90, monkfish have better xp and are faster to catch.
You can catch- Tiger sharks Toehead sharks Whitetip sharks
80+
sand sharks
Sharks give 110 Fishing experience per catch and 210 Cooking experience when cooked. Usually, players never stop burning sharks, even while wearing a skillcape; though, at level 94 cooking, they will not burn sharks if they wear Cooking gauntlets.
Depends if you have money sharks if not monkfish.
Fishing guide
Sharks get their energy from the food they eat/ the prey they catch.
They heal 21 Hp
40
The best bait for sand sharks is squid
NO