
La Cherna Wall
Cartagena / Rosario Islands · Colombia
La Cherna Wall drops from a coral-encrusted lip at 8 metres to a rubble slope at 35 metres, one of the more dramatic vertical features in the Rosario archipelago. Black coral trees and orange elephant ear sponges anchor the upper wall, while deeper sections host sea fans and large loggerhead sponges. Nassau grouper cruise the mid-wall in the cooler months, and the site is named for the Warsaw grouper — cherna in Spanish — which was historically abundant here and still makes occasional appearances. Caribbean reef sharks are reliably encountered on the blue water edge during outgoing tides.
Conditions
Depth
8 to 35 m
Advanced depths
Current
Usually still
Can pick up on the edge
Visibility
8 to 15 m
Clearest in the calm season
Water
26 to 30°C
3mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 26 | 26 | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 26 |
| Vis (m) | 15 | 15 | 15 | 12 | 10 | 8 | 8 | 8 | 8 | 10 | 12 | 15 |
| Current | Moderate | Moderate | Moderate | Gentle | Gentle | Still | Still | Still | Still | Gentle | Moderate | Moderate |
Your chances of seeing each animal
French Angelfish
Last confirmed Jan 25, 2025 · 4 records
Likely
About 6 in 10 dives
Green Moray Eel
Last confirmed Mar 13, 2025 · 1 records
Likely
About 6 in 10 dives
Great Barracuda
Last confirmed Mar 8, 2025 · 1 records
Sometimes
About 1 in 3 dives
Black Coral
Expected
Known here, not yet in recent logs
Orange Elephant Ear Sponge
Expected
Known here, not yet in recent logs
Sea Fan
Expected
Known here, not yet in recent logs
Loggerhead Sponge
Expected
Known here, not yet in recent logs
Nassau Grouper
Expected
Known here, not yet in recent logs
Gear