I listened with interest to someone talking about a marine / tourist study to work out the real value of a fish in Costa Rica.
So why would you do that?
Well if you know the value and the local people (who live and work there and are the biggest influence on fish numbers) do also you can start to protect them better.

But its a wonderful problem and where would you start. Well Im not tourism guru so I'll just add my thoughts and let this post work away.

One might take a dive operation and try to equate the value of fish to their business for example. This has to be multiplied across all business viewing that fish! We might consider that viewing the fish is the biggest value it has for simplicity first. As food in a restaurant it really has a low value, thats the important message though.

Anyone like to expand on that. Would also like to know if there are any studies on fish numbers around the bay islands.