Cycloseris tenuis

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Characters: Polyps are circular, thin and flat. Septa are in markedly different orders but each septum is uniform throughout its length. Costae on the undersurface are thick and irregularly arranged. Colour: Pale brown or yellow. Similar species: Cycloseris costulata, which has thinner, more regular costae. Habitat: Soft inter-reef substrates. Abundance: Rare.

Source reference: Veron (2000). Taxonomic reference: Hoeksema (1989, as Fungia (Cycloseris) tenuis).