What do you do when you already beat the shark in kingdom heart 1

ok i forgot but here i beat the whole game ok but when you beat the shark dang i cant remmber i think oh yeah you go a ship(you know the broken ones seperated) then something happens blah blah blah then you go fight urslia whatever her name called but befor what i said if you see a the mermaid crying in the garden go the place (where king triten sits)then you back and do what i said on the top