The Manacles (from the Cornish Maen Eglos, meaning “Church Stones”) is a sprawling granite reef system off Cornwall’s Lizard Peninsula. Stretching over a square mile, its submerged pinnacles and strong tidal currents have claimed more than 110 recorded vessels since the 17th century.
Why Dive The Manacles?
The combination of nutrient-rich Atlantic water and sheer rock walls makes The Manacles one of the UK’s most biologically diverse marine habitats.
Key Highlights
- SS Mohegan Wreck: A 7,000-ton Victorian Atlantic liner that struck the reef in 1898. Her massive boilers and steel frames lie scattered between 18 and 30 metres.
- Pink Sea Fans & Jewel Anemones: Vertical drop-offs are completely covered in nationally protected Eunicella verrucosa (pink sea fans) and glowing orange/green jewel anemones.
- Mega-Fauna Encounters: During summer months, basking sharks, sunfish (Mola mola), and playful seals frequently patrol the reef edges.
Dive Plan & Conditions
- Tidal Precision: Dived strictly at high or low water slack due to fierce tidal races.
- Departure Point: Porthoustock or Falmouth boat launches.
Marine Life to Spot at The Manacles Reef & Historic Wrecks
- Pink Sea Fans
- Basking Sharks
- Jewel Anemones