A bone, Carbonated Milk and something called the key ingredient.
It doesn't get full. You collect three ingredients and mix them to make a sleeping potion for the shark. (see related question)
You collect three ingredients, mix a sleeping potion, and put him to sleep. (for the solution, see the related question)
Once you collect the ingredients for the sleeping potion, the medicine man mixes them into a sleeping potion for the shark. Once he is asleep, swim out to the island in the bay, where you will find the missing boy, and Professor Hammerhead as well. Lead them back to the beach.
You have to gather three ingredients and mix them into a sleeping potion. There is a medicine man who will mix them for you, and you can feed it to the shark in a coconut. (see the related question)
Find the three ingredients for a sleeping potion, and have the medicine man mix it and put it in a coconut. Feed it to the shark. (see related question)
Booga the giant shark will not go away. You have to neutralize him with a sleeping potion. Gather the ingredients and have them mixed by the witch doctor. (see the related question)
The sleeping potion for the shark requires three ingredients (coconut milk, bone, key ingredient). Find them and take them to the medicine man (in the "tree" next to the ruins), who will mix them into a coconut for you to feed to the shark. (see related question)
The mission on Shark Tooth Island is to rescue the boy who is stranded in an island in Booga Bay (far right of the island) by the giant shark Booga. The solution is to gather the ingredients for a sleeping potion, to be mixed by the island's medicine man. (see related question)
Booga Bay is at the far right on Shark Tooth island. You cannot swim to the second island until you have put the giant shark to sleep. Enter the ruins and recover the ingredients to make the sleeping potion.
You use the cannon
Gather the ingredients to mix a sleeping potion, which you use on the giant shark named Booga which is terrorizing the waters around Shark Tooth Island. Professor Hammerhead, a shark researcher, has been trapped on a small island by the shark. Use his research to enter the underground ruins and discover the secret to saving him.
Visit the Shark Museum and read the journal there. You have to collect three ingredients and take them to the medicine man to create a sleeping potion. You have to put Booga the shark to sleep before you can swim out to the island where the missing boy is. (see related question)