== وصلات خارجية ==* Water flow and feeding in the phylum Porifera (sponges) - Flash animations of sponge body structures, water flow and feeding* Bioerosion website at The College of Wooster* Carsten's Spongepage, Information on the ecology and the biotechnological potential of sponges and their associated bacteria.
==External links==* Water flow and feeding in the phylum Porifera (sponges) – Flash animations of sponge body structures, water flow and feeding* Bioerosion website at The College of Wooster* Carsten's Spongepage, Information on the ecology and the biotechnological potential of sponges and their associated bacteria.