Siargao · Philippines · Coral garden
Casulian Reef
Dense, well-preserved hard coral cover on an easy, relaxed reef
Casulian Reef is a well-preserved hard coral garden with excellent coverage, one of the gentlest dives around Siargao. With no strong currents and a bottom that stays within 18 m, it is an easy, relaxed reef for newly certified divers.
Also known as Casulian.
Where it is and how deep
9.6928° N, 126.0831° EApproximate position — the dashed circle shows where the site lies; your operator's briefing has the mooring.
The dive
The coral garden spreads from 5 m down to 18 m, with excellent hard coral coverage across the reef. There are no strong currents, and the dive is a comfortable, relaxed one from start to finish.
Marine life and season
- Sea turtles
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Fair | Fair | Prime | Prime | Prime | Good | Good | Good | Good | Good | Fair | Fair |
Season follows Siargao: March to May brings the calmest seas and clearest water; from November to February bay diving continues but the Pacific sites, Blue Cathedral included, are less predictable.
Sources
- Siargao diving and snorkeling guide — Mariden Resort
- OpenStreetMap: Casulian Island — OpenStreetMap
More dive sites in Siargao
Cave & cavern
An open Pacific cavern where schooling jacks and barracuda move through
Reef
A submerged rock arch to swim through, framed by hard and soft corals
Reef
A coral reef beside a surf break, falling to sand in the channel
Reef
A resident pink frogfish on three linked reefs near Naked Island
Wall
Whitetip and blacktip reef sharks resting on the reef and patrolling the wall
Similar dives elsewhere
Hawksbill turtles and clownfish colonies on a shore-entry house reef
Dozens of green turtles feeding along the edge of the wall
Hard coral garden with a 20 m maximum and frequent sea snakes
Coral gardens below a century-old lighthouse that still works