The bone is in the middle chamber of the underground ruins. It is at the bottom of the hole with spikes down the sides, and just left of the statue with the giant centipede.
(see related question)
It's in the temple. There's a huge shark statue inside with a big bug crawling on it (you have to avoid the bug). Get on top of the statue and fall down on the left side. There's lots of dirty water and rotten logs. On your left side you will see land. Get on the land and keep going to the left. You will see lots of bones but the one you want is in the giant skull's mouth. Pick it up and you've got it. Continue left to find the Key Ingredient and the exit.
In the Temple
it is under the big tooth
Somewhere in the temple.... 0_o :P
There is no honey on Shark Tooth Island. The three ingredients you need are coconut milk, a creature bone, and the green Key Ingredient. (see related question)
You use it to make the medicine for The great Booga
Shark tooth island is when you have to to save people from a giant shark
In Poptropica there is Shark Tooth island. If I want to beat it I need a bone, but where is the bone.
A coconut bone and secret ingredient
You'll find the bone to the left of the golden statue with the centipede. Underneath the moving platform.
You get the translation paper and go to the cave its on the top left of the cave.
a bone, a gold pot and carbonated coconut milk
There are no mermaids in Shark Tooth island, you do go into the ocean