Desconocida Reef - Alaska
Barren Arch is a firm favourite with our team. We think it’s one of the best ways to experience the Poor Knights, a real journey into the islands' character. You enter through a narrow cut on the seaward side, the kelp-covered boulders at the entrance giving way to deeper water. Drop down to around 15 metres, and the light shifts dramatically. It’s here you’ll find walls absolutely plastered with sponges, bryozoans, and hydroids, a riot of texture and muted colour. Keep an eye out for the endemic Jason Mirabilis nudibranch, often tucked away in these crevices – we’ve had some cracking finds there. The real draw, though, is the sheer volume of fish. Schools of blue maomao and pink maomao create these living curtains of colour, often mixed with demoiselles and koheru. If you’re lucky, you might spot a bronze whaler cruising past the entrance, or a black stingray resting on the sandy bottom inside the arch. We like to drift through slowly, taking it all in, especially on a sunny afternoon when the light filters in. It’s a site that suits divers comfortable with a bit of a current and ready for a proper exploration.
- Location
- Alaska, United States, North America
- Coordinates
- 55.692814, -133.522960
- Type
- reef
- Maximum Depth
- 10-25m
Nearby Dive Sites in Alaska
- Alarm Rocks (wreck)
- Alert Rock
- Amethyst Rock
- Bar Rocks
- Benson Rock
- Bligh Reef (reef)
- Blow Reef (wreck)
- Bonson Rock (wreck)
- Boussole Rock
- Breaker Reef (reef)
- Carlo Rock (wreck)
- Celestial Reef (reef)
- Chanal Reef (reef)
- Client Reefs (wreck)
- Cluster Reefs
Marine Life in Alaska
Home to 64 recorded species including 27 reef fish, 8 whales & dolphins, 7 crabs & lobsters, 5 sharks & rays, 3 other, 2 clams & mussels.
Notable Species
- Pacific herring (Clupea pallasii) - Reef Fish
- Spotted Ratfish (Hydrolagus colliei)
- Shortspine thornyhead (Sebastolobus alascanus) - Reef Fish
- Spiny Dogfish (Squalus suckleyi) - Sharks & Rays
- Calico salmon (Oncorhynchus keta) - Reef Fish
- Eulachon (Thaleichthys pacificus) - Reef Fish
- Whiting (Merluccius productus) - Reef Fish
- coho salmon (Oncorhynchus kisutch) - Reef Fish
- Pink Salmon (Oncorhynchus gorbuscha) - Reef Fish
- Pacific Geoduck (Panopea generosa) - Clams & Mussels
- Slender Sole (Lyopsetta exilis) - Reef Fish
- red salmon (Oncorhynchus nerka) - Reef Fish
- Red Rock Crab (Cancer productus) - Crabs & Lobsters
- California Spot Prawn (Pandalus platyceros) - Crabs & Lobsters
- Shiner Perch (Cymatogaster aggregata) - Reef Fish
- Giant kelp (Macrocystis pyrifera) - Seagrass & Algae
- Dungeness Crab (Metacarcinus magister) - Crabs & Lobsters
- Spawn (Gasterosteus aculeatus) - Reef Fish
- Sunflower star (Pycnopodia helianthoides) - Starfish
- Chinook (Oncorhynchus tshawytscha) - Reef Fish