
Ant Atoll
Pohnpei · Federated States of Micronesia
Ant Atoll is a small, uninhabited atoll 10 kilometers southwest of Pohnpei, enclosing a pristine lagoon with crystal-clear water and one of the least disturbed reef ecosystems in all of Micronesia. Its remoteness and the lack of any permanent human settlement have preserved shark populations and coral coverage that have disappeared from most comparable sites in the region. Divers make a full-day expedition here, typically completing two dives on the outer reef passes and one on the lagoon patch reefs before the return crossing.
Conditions
Depth
5 to 35 m
Advanced depths
Current
Usually gentle
Can pick up on the edge
Visibility
25 to 40 m
Clearest in the calm season
Water
27 to 30°C
3mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 |
| Vis (m) | 20 | 20 | 22 | 25 | 25 | 25 | 25 | 25 | 22 | 20 | 18 | 18 |
| Current | Moderate | Moderate | Gentle | Gentle | Gentle | Gentle | Gentle | Gentle | Moderate | Moderate | Moderate | Moderate |
Your chances of seeing each animal
Bumphead Parrotfish
Last confirmed Apr 1, 2026 · 1 records
Sometimes
About 1 in 3 dives
Blacktip Reef Shark
Last confirmed Aug 10, 2025 · 1 records
Rare
Now and then
Golden Damselfish
Last confirmed Apr 4, 2026 · 3 records
Rare
Now and then
Grey Reef Shark
Expected
Known here, not yet in recent logs
Staghorn Coral
Expected
Known here, not yet in recent logs
Oceanic Manta Ray
Expected
Known here, not yet in recent logs
Small Giant Clam
Expected
Known here, not yet in recent logs
Blue Linckia
Expected
Known here, not yet in recent logs
Gear