Dive-site story
Located directly off the mainland coast near Tongkaina in North Sulawesi, Thalassa House Reef transitions from shallow seagrass flats into a gently sloping bottom composed of mixed sand, rubble, and coral bommies. It is heavily utilized for muck diving, night dives, and unhurried macro critter searches.
Reliable dusk dives to observe mandarin fish mating rituals among branching coral heads
Macro hunting along volcanic sand patches with camouflaged benthic predators
Calm, straightforward shore entries suitable for unguided buddy teams and orientation dives
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Calmest sea conditions and lowest rainfall occur during the dry season, though diving runs year-round.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mandarin fishSynchiropus splendidus | Common | ||||||||||||
| Broadclub cuttlefishSepia latimanus | Common | ||||||||||||
| Painted frogfishAntennarius pictus | Common | ||||||||||||
| Robust ghost pipefishSolenostomus cyanopterus | Seasonal | ||||||||||||
| Blue-ringed octopusHapalochlaena | Rare |
Marine forecast
