Koh Bida Nai (Inner Father Island) in Thai is a limestone island that rises dramatically from the sea to the south of Phi Phi Ley. Along with it's twin site of Koh Bida Nok this is regarded as Phi Phi's best dive area and is where most of the dive boats coming from Phuket Island choose to dive. 
Where trees cling to the rocks above the waterline they are replaced with corals below. Walls are covered with zigzag clams, huge gorgonian sea fans and sea whips. Boulders form swim-throughs and staghorn patches are home to thousands of fish.
Descending the mooring line takes divers to the top of a small boulder formation. Swim into the wall of glassfish below and they will part to reveal a swim-through like a secret door. Bearded scorpionfish like to sit on the bottom here so care is needed with buoyancy. On the outer edge of the swim-through it is normally possible to see harlequin ghost pipefish and seahorse. On the inner side moray eels poke their heads from the rock to be cleaned by boxer shrimp. Moving east around the island you pass small coral bommies and a colourful sloping wall covered with anemones and resident clown fish. Look for beautiful porcelain crabs on the edges of the anemones. Continued >>
Phi Phi dive sites:
Bida Nai, Bida Nok, Gareng Heng, Hin Dot, Wang Long, Maya Bay, Maya Wall, Loh Samah Bay, Phi Phi Shark Point (Hin Bida), Shark Point, Anemone Reef, King Cruiser Wreck |
