I mentioned this in the review of Biyadhoo that I have submitted to TA and thought I would mention it on the general forum.
We noticed an increasing number of people wandering out into the lagoon at low tide and hand feeding the fish. As a consequence, the fish quickly came to regard any swimmer or snorkeller as a source of easy food. Not too much of a problem if the fish are small but when a large (2½ft) Titan Trigger fish swims up to you looking for food then this is unnerving to say the least!
So, please don't feed the fishes. They don't need the food and it makes them "confrontational".