CCRI Website

Mesophotic Reefs

Underwater  Transect

What is a Mesophotic Reef?:
Mesophotic Coral Ecosystems (MCEs) extend from 30 m (100 ft) to greater than 100 m (330 ft) and are characterized by the low availability of light for photosynthesis and the presence of corals, sponges and algae as the dominant structural components. Little is known of their distribution, abundance, productivity and susceptibility due to difficulties of working at depths beyond the range of conventional SCUBA diving.

This brightly colored rare Pastel Soft Coral, Neospongodes portoricensis (on top), filmed from the ROV in southern PR waters, inhabits mesophotic reef walls and overhangs. Snapshot of the ROV recording was taken south of Caja de Muertos, Ponce PR.


Mona Island, Puerto Rico

Coral Reef Observations

CCRI encompasses research and monitoring activities involving field work aimed at addressing the major threats to coral reef ecosystems in the Caribbean, including Mesophotic Coral Ecosystems.