Scuba Republic House Reef - Raja Ampat

Forget what you think you know about shark dives. The Colosseum, tucked away in the Somosomo Strait, isn't about feeding frenzies or chumming. This is a sanctuary, pure and simple, and it shows. We’ve been here when the water felt like bathwater, sun filtering down through 25 meters of blue, making the coral heads glow. We’ve also been here on days when the current decided to put on a show, zipping us past schools of Pacific Half-and-half Chromis so thick you could almost taste them. What makes this spot special? It’s the sheer numbers, yes, but it’s also the calm. Descending to 19 meters, you’re often greeted by the steady, unhurried patrol of bull sharks. Not one or two, but a dozen or more, gliding past, their eyes curious, not aggressive. We’ve seen blacktip reef sharks weave through the corals, and on a really lucky day, a lone tiger shark might make a majestic pass in the deeper water just beyond the reef edge. Keep an eye out for the smaller stuff too; the Soft Locust Lobsters are surprisingly shy, and we love spotting the flash of a Coral Beauty against the darker coral. It’s a site that rewards patience. For divers looking for a profound shark encounter, one that feels less like a spectacle and more like an observation, this is our top pick. You’ll be immersed in an active, healthy ecosystem, watching truly wild sharks in their element.

Location: Raja Ampat, Indonesia, Southeast Asia
Coordinates: -0.442800, 130.753500
Type: reef

Marine Protected Area: Teluk Mayalibit (Raja Ampat)

Best Time to Dive in Raja Ampat

The warmest water temperatures in Raja Ampat occur in November, averaging 30.3°C. The coolest conditions are in July at 29.3°C.

Monthly Water Temperatures

January: 29.7°C
February: 29.4°C
March: 29.6°C
April: 29.9°C
May: 29.9°C
June: 29.7°C
July: 29.3°C
August: 29.4°C
September: 29.6°C
October: 30.0°C
November: 30.3°C
December: 30.1°C

Nearby Dive Sites in Raja Ampat

Nearest Dive Centres to Scuba Republic House Reef

Marine Life in Raja Ampat

Home to 250 recorded species including 176 reef fish, 43 hard corals, 8 seagrass & algae, 5 sea cucumbers, 4 clams & mussels, 4 other.

Notable Species

Boring Clam (Tridacna crocea) - Clams & Mussels
Blue-lined Surgeonfish (Acanthurus lineatus) - Reef Fish
Fluted clam (Tridacna squamosa) - Clams & Mussels
chocolate chip sea star (Protoreaster nodosus) - Starfish
Pinkfish (Holothuria edulis) - Sea Cucumbers
Staghorn coral (Acropora solitaryensis) - Hard Corals
Stripy (Katsuwonus pelamis) - Reef Fish
Indian mackerel (Rastrelliger kanagurta) - Reef Fish
Bristle-toothed Surgeonfish (Ctenochaetus striatus) - Reef Fish
Kawakawa (Euthynnus affinis) - Reef Fish
thalassia (Thalassia hemprichii) - Seagrass & Algae
Small giant clam (Tridacna maxima) - Clams & Mussels
Bullet Mackerel (Auxis thazard) - Reef Fish
Common Mushroom Coral (Fungia fungites) - Hard Corals
Species code: Ea (Enhalus acoroides) - Seagrass & Algae
Table coral (Acropora clathrata) - Hard Corals
Branch coral (Acropora florida) - Hard Corals
cymodocea (Cymodocea rotundata) - Seagrass & Algae
Narrow-barred Spanish mackerel (Scomberomorus commerson) - Reef Fish
Tail-spot Combtooth-Blenny (Ecsenius stigmatura) - Reef Fish

Recommended Packing List for Scuba Republic House Reef

Based on average water temperature of 29.7°C, currents 20 cm/s.

Shorty or Rashguard - warm 30°C water needs minimal exposure protection
Mask - essential for every dive
Fins
BCD - buoyancy compensator
Regulator - your most safety-critical piece of gear
Dive Computer - tracks depth, time, and NDL
Surface Marker Buoy (SMB) - essential for boat pickups
Dive Torch - useful for crevices and colour at depth
Underwater Camera - capture your diving memories