Phylum Porifera –

– Marine.

– Multicellular, cellular grade body.

– Asymmetrical.

– Water canal system for food, respiration and excretion.

– Body wall with many pores – Ostia.

– Diploblastic.

– Water enters through Ostia and goes out through Osculum.

– Skeleton of spicules or spongin fibres.

– Hermaphrodite.

– Reproduction asexual by fragmentation and sexual by gametes.

– Fertilisation is internal, development indirect.

– eg. Sycon, Spongilla, Euspongiaetc.


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