Poriferan animals differ from coelenterate animals in following aspects :

1. Animals from Porifera show cellular level of organisation, while those from Coelenierata show tissue level of organisation.
2. Poriferans have no digestive or gastrovascular cavity while coelenterates have such cavity.
3. Poriferans have central cavity called spongocoel has many opening viz. ostia and osculum while coelenterates have central cavity called coelenteron has one opening.”