. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 183 Thalassodendron ciliatum (Forsskal) den Hartog Location and sampling sites. Saya de Malha Bank, Mascarene subwater ridge, 20 m depth, 25 July 1981, four plants; 50 m depth, 4 August 1981, nine plants (Fig. 5), collected by Gabrielian. * A Seychelles. Coetivy atoll, eastern coast, 3 March V^ F 1984, 50 m depth, eight plants, collected by Yu. M. ^jSiSL Latypov; Coetivy atoll, western coast, 14 January ^Qjl 1989, 20 m depth, one plant, collected by N. I. Selin; fc^a / Desroshes Island, northwestern coast
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 183 Thalassodendron ciliatum (Forsskal) den Hartog Location and sampling sites. Saya de Malha Bank, Mascarene subwater ridge, 20 m depth, 25 July 1981, four plants; 50 m depth, 4 August 1981, nine plants (Fig. 5), collected by Gabrielian. * A Seychelles. Coetivy atoll, eastern coast, 3 March V^ F 1984, 50 m depth, eight plants, collected by Yu. M. ^jSiSL Latypov; Coetivy atoll, western coast, 14 January ^Qjl 1989, 20 m depth, one plant, collected by N. I. Selin; fc^a / Desroshes Island, northwestern coast, littoral zone, 6 *m February 1989, 14 plants, collected by Titlyanov; Astov atoll, m depth, to March 1989, one plant, collected by N. I. Selin; La Digue Island, north-western extremity near Praslin Island, lower littoral zone, 26 February 1989, four plants, collected by N. I. Selin; Farquhar atoll, 3 m depth, 23 January 1989, four plants, collected by N. I. Selin; Providence Island, m depth, 5 March 1989, four plants, collected by N. I. Selin. Th. ciliatum has a discontinuous distribution. This species is common in the Red Sea and in the eastern and western Indian Ocean (den Hartog, 1970) at Mascarene subwater ridge (Kalugina-Gutnik et al, 1992). In the northeastern part of Coetivy atoll, Th. ciliatum grows at a depth of 17 to 25 m. Total community biomass, including Halimeda spp., constitutes 1,640 - 2,319 gnr2 (wet weight) with 10% coverage over the bottom. Th. ciliatum grows most extensively at African Bank, South Island. At depths from 10 to 31 m, biomass varies from 440 to 2,240 gnr2 wet weight with the coverage estimated from 50 to 90 %, with an almost complete absence of associated seaweeds. Though generally common for the Seychelles, Th. ciliatum has only recently been found at the Desroshes, La Digue, Providence, Cerf Islands and Astov, African, Coetivy, Farquhar, St. Joseph, Cosmoledo atolls (Kalugina-Gutnik et al., 1992) (Fig. 2). The depth at which th
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