Tethya samaaii, also known as the red golf ball sponge, is a species of sea sponge belonging to the family Tethyidae. It is spherical in shape and grows to about 6 cm in diameter. It is reddish in colour. It appears to be endemic to the west coast of South Africa and has been found in 12m of water.Samaai, T. and Gibbons, M.J. 2005. Demospongiae taxonomy and biodiversity of the Benguela region on the west coast of South Africa. Afr. Nat. Hist. 1(1):1-96
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