Ao Luek featured schools of butterflyfish and even yellow - tailed barracuda which I was not expecting to see at Koh Tao. (dive-the-world.com)
There are many channels and gullies through the underwater forest for divers to explore and here you will find yellowtail snappers, Nassau grouper and schoolmasters clustering in small groups, and pairs of banded butterflyfish hiding from inquisitive eyes. (dive-the-world.com)
But there are other attractive dive sites such as pinnacles with enormous groups of schooling pyramid butterflyfish, triggerfish and pelagic fishes such as tunas passing through, spectacular hard coral reefs next to the volcano, and great muck dives with lots of mandarinfish in the local jetty. (mermaid-liveaboards.com)