Said volcanic islands have spectacular corals reefs and variety of fish like Manta Rays, Hammerhead Sharks, Barracudas and many other pelagic fishes. (divezone.net)
Also to be seen are a number of other pelagic species and some macro life too. (sipadan.com)
However, when it can be dived and currents are swift, divers get to experience a drift that attracts the big schools of fish, which in turn attract Caribbean reef sharks; the occasional hammerhead, mantas, schooling eagle rays in groups of up to 40 or 50, and lots of other pelagic life not normally seen in calmer areas. (blackbirdresort.com)