marine reef biome marine subtidal rocky reef biome ENVO The marine rocky subtidal reef biome comprises regions of the marine reef biome composed mainly of rock and which harbour abundant communities of algae and invertebrates. These reefs are often very patchy, with alterations of rocks dominated by rich invertebrate assemblages and turf-forming calcareous red algae. ORCID:0000-0002-4366-3088 2010-03-15T11:27:06Z ENVO:01000050