But, they would have to strip the body because sharks don't eat clothing...and also, they don't eat hair and some it might wash ashore.
Offshore, I suggest a container would be best. Something like a 55 gallon metal oil barrel with an anchor in the bottom. Seal the top tight and puncture it so water can seep in.
If not that, I think an abandoned well on the island would be the ideal place to hide a body.
I'm hearing reports from Aruba which suggest that there could be an anti-US media demonstration forming near the Court house ... possibly to be more formalized at 5 PM EST.
No word on the size of any group there now, or anticipated.
Unconfirmed - developing.
Or septic tank. Any storage tank type object. Water tank. What about that oil refinery. Isn't that where the decapitated guy worked. Maybe he saw something.