About Trachycladus spinispirulifer (Carter, 1879)
Trachycladus spinispirulifer, commonly called the orange wall sponge, can reach 20 cm (7.9 in) thick and up to 2 m (6.6 ft) in length. It is a very large, firm sponge with an orange outer skin and a yellow interior. It grows in a wall-like shape and does not have obvious visible oscula. Its surface is largely smooth, marked by shallow ridges and unevenly distributed rough patches. It has a cork-like texture. This sponge has been recorded from the south and west coasts of South Africa, Namibia, the South Atlantic, Vema Seamount, Australia, New Zealand, Ternate, and Zanzibar. It inhabits rocky reefs at depths ranging from 5 to 350 m (16 to 1,148 ft), and is most often found growing on vertical rock faces and within rock crevices.
