Do you remember when your instructor told you to look for the small things? Twins is the ideal place to take that advice. Two groups of rocks at depths from 10 meters to 18 meters. Your instructor may show you the haunts of grouper, panda clownfish and stingrays, but if you take your time and look closely you might also see anemone shrimp, morays, flatworms and pipefish, as well as cleaner wrasse at their never-ending work.
Check the crevices for baby angelfish, keep an eye on the water above for squid and crocodile longtom and look for the dancing fins of the juvenile sweet lips.