Movie Long Beach Island

What is the name of this Movie!!! Please help!!!?

I am 19 now and when I was little I used to watch Swiss family Robinsons at my Grandmothers all the time, we also watched another old movie, but I can remember the title of it for the life of me its been so long I can only remember a few parts so here they are. It is about a Teenage boy who leaves his tribe for some reason and makes a boat and then gets stuck on some Island and he makes goggles from some part of a sea turtle I think he finds dead on the beach. and one time when he is in the water he kills a Big Eel by wrapping his shirt around his arm and then spearing it. I know these are vague parts but does any one know what movie I am talking about??!
It is not Blue Lagoon.
I can find any info on Blue tide, It doesnt look like it is the silent one

The first time you asked this I suggested “The Silent One”…

http://us.imdb.com/title/tt0088118/

Rings a bell?

Does the boy have a pet albatross?
Try searching for a movie version of “Call it Courage”…

Long Beach Island 2008