Where are the sharks on sims 2 castaway?

on 2nd island at beach were you have to make the conoe,on the 3rd island at tidal pool (to get there you must go to the ancient thearter jump off the cliff)fish in the tiny hill between the water,or go to the crystal island then fish in the big dam (to catch the shark you a bamboo or wooden fishing pole and for more chance have 10 logic good luck