Flat leaf spongeThe flat leaf sponge is a species of marine demosponge in the family Isodictyidae. This sponge is known from the west coast of South Africa to False Bay. It is endemic to this region.DescriptionThe flat leaf sponge may grow to 1 cm thick and 20 cm high. It is an erect, thin-bladed sponge, with the blades narrowing to points at the tips. Its texture is smooth but slightly hairy with small oscula on the blade edges. It is orange-red in colour.HabitatThis sponge lives on rocky reefs from 15-37m.