Bida Nai
"Inner Father" lies one kilometre south of Phi Phi Leh. Like its larger neighbour, Bida Nok, Bida Nai is a limestone cliff islet with similar underwater terrain.
Its walls are perhaps less spectacular, but there are larger fields of hard corals, such as staghorn coral reef, and Bida Nai is equally the best Phi Phi diving site.
There are titan triggerfish, Orange-lined and Indian triggerfish, crocodile long toms, as well as squid and cuttlefish.
Once again, you're more than likely to come across leopard sharks, especially active early mornings, or asleep on the sandy bottom during the day.
Bida Nai Reef Basics: Staghorn Reef and wall diving
Depth: 5 - 30m
Visibility: 10 - 20m
Currents: Easy
Surface Conditions: Can be choppy
Water Temperature: 27 - 30°C
Experience Level: Easy - Intermediate
Diving Season: All year round
PADI Course Compatibility: Great for leopard shark awareness and underwater naturalist
Distance: ~45 km east of Phuket (3 hours), 30 km southwest of Krabi (2½ hours)
Access: Phi Phi scuba diving day trips, or from Phuket or Krabi, and Thailand liveaboard trips
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