Oahu
United States · Hawaii
Oahu blends accessible wreck diving with vibrant reef ecosystems nurtured by warm Pacific currents. Artificial reefs like the YO-257 have transformed into thriving coral habitats, while volcanic lava formations shelter green sea turtles and reef sharks year-round.
How this reef is doing
ⓘ How we measure thisReef state
Live science signals for this reef are still being gathered.
Coral cover
Fish life
Fewer fish than a healthy reef of its kind.
Heat
Fishing
Open to fishing, and the water is busy.
Sources · Reef Life Survey · Global Fishing Watch and reef gravity
What you will see
17 species across the dive sites here
Green Sea Turtle
Seen 2 months ago
at Shark's Cove
Least concern
Brown Anole
Seen 2 months ago
at YO-257 Wreck
Least concern
Red-Crested Cardinal
Seen 2 months ago
at YO-257 Wreck
Least concern
Hawaiian Green Sea Turtle
Seen 2 months ago
at Electric Beach
Least concern
Red Junglefowl
Seen 2 months ago
at Shark's Cove
Least concern
African Giant Snail
Seen 2 months ago
at Shark's Cove
Spinner Dolphin
Seen 3 months ago
at Electric Beach
Least concern
Whitetip Reef Shark
Seen 3 months ago
at YO-257 Wreck
Vulnerable
Pacific Golden-Plover
Seen 3 months ago
at YO-257 Wreck
Least concern
Hawaiian Cleaner Wrasse
Seen 3 months ago
at Shark's Cove
Least concern
Bluestripe Snapper
Seen 4 months ago
at YO-257 Wreck
Least concern
Cornetfish
Seen 4 months ago
at Electric Beach
Least concern
Hawaiian Lionfish
Seen 5 months ago
at Sea Tiger Wreck
Least concern
Ornate Butterflyfish
Seen 8 months ago
at Shark's Cove
Least concern
Yellowmargin Moray
Seen Jul 2025
at Shark's Cove
Least concern
Giant Moray
Seen Jan 2025
at Sea Tiger Wreck
Least concern
Spotted Eagle Ray
Seen year round
at Sea Tiger Wreck
Endangered
Dive sites
YO-257 Wreck
green sea turtle · bluestripe snapper · whitetip reef shark · red-crested cardinal
Sea Tiger Wreck
spotted eagle ray · giant moray · hawaiian lionfish · red-crested cardinal
Electric Beach
spinner dolphin · hawaiian green sea turtle · cornetfish · pacific golden-plover
Shark's Cove
hawaiian cleaner wrasse · ornate butterflyfish · yellowmargin moray · green sea turtle