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Genus Laurencia is found globally on shores in temperate to tropical area, "littoral to sublittoral," and are seen at depths up to 65 m deep. A variety of species are found near the British Isles (see below).
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The AlgaeBase, a database with detailed information on species of Laurencia, includes 145 taxonomically accepted species as of October 2015, and differentiates these from a further ~375 entries of uncertain taxonomic status, and further delineates homotypic or heterotypic synonyms.