Koh Bida Nok (★4.7)
This is one our favourite dive sites since it has the widest range of wildlife. The reef gently slopes down from the island apart from the wall at the south west which drops 22-26 meters.
The lion’s mane jellyfish is the world’s largest jellyfish species. This open-ocean dweller can grow to over 2 m (6-7 ft) in diameter and have tentacles trailing behind them up to 120 feet long. The “mane“ of these long, hair-like tentacles hangs from the bell-shaped body’s underside, consisting of eight tentacle clusters housing up to 150 tentacles per cluster. These gelatinous creatures are easy to spot thanks to their large size and dark yellow to reddish hue, and bioluminescent abilities, which help them stand out against the blue background of the water.