Some lophelia coral reefs can be enormous, stretching for several miles and rising to at least 100 feet (30 m) above the seafloor. Lophelia coral reefs of this size may be tens of thousands of years old. Individual living lophelia colonies are extremely slow growing and are known to live for more than 1000 years. This species is commonly found down to depths of approximately 3300 feet (1000 m), but it has been observed or collected from depths of nearly 10,000 feet (3000 m).