The red encrusting sponge (Clathria oudekraalensis) is a species of sea sponge.

[1] It is known only from the South African coast, on both sides of the Cape Peninsula.

It is a bright red encrusting sponge.

Its surface is smooth and the oscula are not visible.

[1][2] This sponge lives on rocky reefs in 6-24m of water.