Mil Channel
Manta Ridge · Federated States of Micronesia
Tidal channel where reef mantas come in to feed and be cleaned. On incoming tide, dozens stack up at the cleaning stations. The channel runs only 25 m deep — easy long dives waiting for mantas to drop in.
Conditions
Depth
8 to 25 m
Open water and up
Current
Can be moderate
Can pick up on the edge
Visibility
15 to 25 m
Clearest in the calm season
Water
27 to 30°C
Tropical wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 |
| Vis (m) | 15 | 15 | 15 | 20 | 20 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
| Current | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
Your chances of seeing each animal
Reef manta ray
Last confirmed Apr 15, 2026 · 65 records
Almost always
Nearly every dive
Whitetip reef shark
Last confirmed May 29, 2025 · 1 records
Likely
About 6 in 10 dives
Bumphead parrotfish
Last confirmed May 28, 2025 · 1 records
Likely
About 6 in 10 dives
Mandarinfish
Last confirmed Jul 1, 2025 · 1 records
Rare
Now and then
Yap Monarch
Last confirmed Dec 17, 2024 · 1 records
Rare
Now and then
Blacktip Reef Shark
Expected
Known here, not yet in recent logs
Reticulated Damselfish
Expected
Known here, not yet in recent logs
Pacific Bullethead Parrotfish
Expected
Known here, not yet in recent logs
Gear