Hi:
Bonaire is a great place to dive. When I was there earlier this month, I happened upon one tarpon on a reef at around 75 feet or so, but when we dived the Hilma Hooker wreck later we found a few tarpon & (on the bottom below one end) a large green moray eel.
The parrot fish get pretty large. We saw some small barracuda but not really large ones.
My buddy spotted a pod of dolphin in the distance (at the surface).
What I'm saying is, you can have a great time diving Bonaire, but you're probably not going to get close encounters with mantas, whale sharks, that sort of thing.
A sampling of things I saw over 10 dives: 1 big green moray, a couple of (likely spotted) morays, 1 'some other kind' of moray, a few tarpon, a couple of scrawled file fish, a white spotted filefish, an orange spotted filefish, a couple of queen angel fish, a couple of French angel fish, 1 or 2 porcupine puffer fish, a couple of scorpion fish, some (?horse-eyed) jacks, many parrot fish of varied kinds, several small barracuda, 2 juvenile green sea turtles, a big octopus in a hole, cow fish, smooth trunkfish, surgeonfish, more French grunts & yellow-striped goat fish than you could shake a stick at, some yellow snapper, a flounder, yellow-tailed damselfish, rock beauties, sergeant majors, trumpetfish, blue-striped grunts...
And a bunch of other stuff. But those are some of the memorable highlights.
Richard.
