Infaunal: Animals living within sediments, which are large enough to displace that sediment.
Interglacial: A warm phase of a glacial period, between glacials.
Journal: Used to describe scientific magazines and papers.
Keystone species: A predator at the top of a food web, capable of consuming organisms of more than one trophic level beneath it and strongly affecting community structure.
Lander system: Scientific instrument designed for temporary deployment on the sea floor in order to monitor environmental parameters.
Larva: A juvenile phase differing markedly in morphology and ecology from the adult.
Larval settlement: Settling of planktonic larvae on any substrate.
Lithoherm: Consolidated ridge-like seabed elevations composed of skeletal material such as coral rubble.
Longshore current: A current moving parallel to the shoreline.