Sail Rock · Koh Tao
7 species, most likely first·How chances work
Calotes thailandensis
Almost always
Nearly every dive
Greater Racket-Tailed Drongo
Schooling chevron barracuda
Whale sharkEndangered
Likely
About half of dives
Bigeye trevallyLeast Concern
Fluted Giant Clam
Pink anemonefishLeast Concern
What the labels mean
