divepix - Dark Volcano Sponge

Dark Volcano Sponge

Aspect:	Brown, smooth semi-hard mass, from which randomly scattered volcano chimney-shaped excurrent openings randomly emerge . Overall shape depends on substrate on which it spreads.
Population:	Common.
Notable feature:	Often homes tube worms like feather duster worms
Environment:	Grows on solid structure in open relatively shallow waters.
Behaviour:	-