The wide oral disc overhangs the column and is covered with a very large number of short tentacles arranged in whorls.

Large numbers were observed at the site of a whale carcase that had sunk to the sea floor at 3000 metres (10,000 ft).

These anemones are typically found unattached on muddy, sandy and gravelly sediments but also occur near deep water hydrothermal vents and cold seeps.

It uses its tentacles to capture plankton, small crustaceans, krill and other organic food particles floating past.

[3] In a study of a whale carcase that had fallen to the seafloor in Monterey Canyon, it was found that many specimens of L. brevicorne accumulated alongside.