Red-tailed butterflyfish
It's the red-tailed butterlyfish, Very common fish around the Similan islands. It usually swims at depths of between 3 and 15 meters. It can grow to 18 cm in length. The red-tailed butterflyfish is brown to black, with lighter scales giving it a spotted appearance. It has a prominent, vertical white streak behind the eyes, a dark stripe over the eyes, and another, smaller white stripe in front of the eyes. The base of the tail is bright red, followed by a black stripe. The tip of the tail is diffuse white. Its diet consists of coral polyps.
You can see the red-tailed butterflyfish on a Similan islands diving trip
You can see the red-tailed butterflyfish on a Similan islands diving trip
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