Boring sponge in
the shell of a Black clam

The sponge has bored holes in the mussel shell. Through these greenish inhalent and exhalent tubes protrude papillae. The greenish colour originates from a symbiotic algae, which the sponge exchanges nutrients with. Boring sponges can even obtain food by filtering very small particles out of the water.

Boring sponges     Other names
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© Aquascope 2000   Tjärnö Marine Biological Laboratory, Strömstad, Sweden
Bo Johannesson | Martin Larsvik | Lars-Ove Loo | Helena Samuelsson