Phaeophyceae | Dictyotales
Guiry, M.D. and G.M. Guiry. 2009. (Ref. 80701)
Size / Weight / Age
Climate / Range
Indo-Pacific: from Seychelles and Thailand to Japan, Indonesia, Micronesia and Fiji.
Thalli fan-shaped, yellowish brown to light brown or slightly whitish due to light calcification. Blade entire or divided into lobes, consisting of 2 layers of cells. Lower surface of blade divided into concentric zones by hairlines which are equidistant from each other; non-indusiate reproductive sori also form concentric lines directly above each hairline. Blade up to 10 cm in height (Ref. 80758).
A source of algin (Ref. 80758); very abundant during the sunny months of the year (Ref. 80758). Attached to solid substrates on reef flats or in the upper subtidal zone, or epiphytic on large macrobenthic algae and seagrass. Grows on inner reef flats and on tidal pools on the outer portions of reef flats (Ref. 80758)
IUCN Red List Status (Ref. 114614)
CITES status (Ref. 94142)
Threat to humans
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Estimation of some characteristics with mathematical models