Koh Bida Nai dive site mapKoh Bida Nai

Koh Bida Nai (inner Island)

  • Distance: 56 Km boat trip of approx. 150 minutes.
  • Depth: 0-30 meters
  • Experience: Beginner to advanced

  • Type: Reef, coral garden, steep wall with overhangs, limestone
  • Visibility: Variable, 10-25 meters

  • Current: Variable, mild to strong

  • Corals: Colorful soft corals, hard corals, anemones

  • Fish: Many species

  • Highlights: Blacktip reef sharks, turtles, enormous snapper schools, seahorses, nudibranchs

Koh Bida Nai, the sister island nearby Koh Bida Nok, is also part of the Phi Phi Islands National Park. This varied dive site consists of a sheltered bay, an impressive, beautifully overgrown steep wall with various overhangs and a large isolated rock with a swim-through. At certain points the exposed reef drops down to 30 meters, which is why Koh Bida Nai is also a challenging dive site.
The feature of this dive site is the magnificent coral-overgrown northern wall. There are also usually many and extremely varied nudibranchs to be spotted. A large swim-through is located on the southeastern side. There are also countless numbers of yellow snappers found here. In the shallow areas, black-tip reef sharks patrol inexorably. Turtles, especially the endangered hawksbill, are very common here. Also grouper, tuna, moray eels, and ghost pipefish are regularly found. Sometimes a tigertail seahorse and an octopus turn up in the western coral gardens. The reef covered in anemones within the bay, slopes down gently and gives divers a fantastic dive, even if sea conditions are rough.


Koh Bida Nai can be dived as part of a Phi Phi Islands Overnight Trip, Island hopping and dive cruisehttps://alohadiving.com/product/hin-deang-hin-muang-itinerary/ or Green Season Liveaboard Trip.

Koh Bida Nai is selected based on the weather conditions, currents, overall safety and suitability for the majority of divers on the boat. We cannot guarantee specific dive sites prior to the boat departing.