We have a couple of dive sites around Koh Tao where you can find big schools of Batfish. The biggest one has got to be the Sail Rock schooling Batfish. There are 100’s of them swimming in the blue close to the rock and getting the occasional cleaning session on the reef by cleaner wrasse. When they all group together and swim synchronically in one direction it is a very impressive sight! A great opportunity for photos or video. At the other deeper dive sites like Chumphon Pinnacle, Shark Island and Southwest we also see some smaller schools.