In hues of purple, red, or yellow, sponges are some of the most
brightly colored organisms in the intertidal zone. Sponges are
sheets of smooth, but not slimy, mats covered with raised tubes.
These tubes look like small volcanoes and help filter food out of the water.
Habitat/Range: Sponges   are found in clumps across rocks and
other hard surfaces, usually in shaded and protected areas. Sponges
range from Washington to Central California.