Rock Monster Chimney
Cayman Brac · Cayman Islands
Rock Monster Chimney is a wall dive on the south side of Cayman Brac featuring a distinctive volcanic chimney formation that divers descend through from 15 metres to exit on the wall at 27 metres. The chimney interior is lined with orange sponges and tube worms, and silversides fill the passage during summer months. Outside on the wall face, black coral trees grow at depth and large barrel sponges anchor the coral landscape. Spotted eagle rays are frequently seen cruising the wall, and the overhang at the chimney base shelters resting nurse sharks.
Conditions
Depth
12 to 40 m
Advanced depths
Current
Usually still
Can pick up on the edge
Visibility
20 to 35 m
Clearest in the calm season
Water
24 to 29°C
swimsuit or 1mm
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 24 | 24 | 24 | 25 | 26 | 27 | 28 | 28 | 28 | 27 | 25 | 24 |
| Vis (m) | 25 | 25 | 25 | 25 | 25 | 20 | 20 | 15 | 15 | 20 | 25 | 25 |
| Current | Gentle | Gentle | Gentle | Gentle | Still | Still | Still | Still | Gentle | Gentle | Gentle | Gentle |
Your chances of seeing each animal
Orange Tube Sponge
Last confirmed Nov 22, 2025 · 20 records
Very likely
Most dives
Barrel Sponge
Last confirmed Jun 16, 2026 · 36 records
Very likely
Most dives
Nurse Shark
Last confirmed Sep 26, 2025 · 10 records
Very likely
Most dives
Caribbean Reef Octopus
Last confirmed Nov 29, 2025 · 6 records
Very likely
Most dives
Southern Stingray
Last confirmed Mar 25, 2026 · 13 records
Very likely
Most dives
Spotted Eagle Ray
Last confirmed Oct 20, 2025 · 2 records
Likely
About 6 in 10 dives
Yellowhead Jawfish
Last confirmed Sep 26, 2025 · 4 records
Likely
About 6 in 10 dives
Creole Wrasse
Last confirmed May 7, 2025 · 1 records
Likely
About 6 in 10 dives
Gear