Allen wrote:
You are correct, it does not look like a fish. That is why they are just passed over many times when diving. If you look closely, you may be able to detect its tail and its right fin. What I believe to be its eye is toward the bottom right of its body. This is the only one I have spotted while diving. This and the hammerhead shark I saw in Turks, are my rare finds.
It is not a fish, it is a Sea Urchin that when it dies leaves what we call Sand Dollars behind. These are quite common, people pass them bye because they are in a rush to see everything and they miss the most. I try to tell people take a 10 foot square section of a reef and really study it. You will be amazed at how much life is in the section. Many have come back and said they could not believe they swam past all they found.