Branching tube sponge Bicolored sponge. Usually purple with yellow (especialy inside). But also orange or grey forms occur. The sponge usually forms several long tubes which are rounded at the top. Surface knobbed in a regular pattern. More rare is the spherical yellow morph. Lees meer
Stove-pipe sponge Sponges. Tubes are long, slender, thin, and soft-walled. Exterior, shades of lavender, shades of gray or brown. Tubes' interiors often cream colored, but may be lighter shade of exterior color. Grow as solitary specimens or in clusters. Lees meer