Most of the porifera (sponges) have a larval form that IS motile. They can reproduce asexually, a piece of sponge can grow into a whole new sponge. But they also reproduce sexually which produces a larva and not a spore or 'seed' that grows into a new sponge.
The porifera can not produce their own food as plants do. They 'prey' on miniscule plants and animals which they filter from the water passing thru their PORES. Therefore they are animals and not plants.
Porifera (pōrĭf'ərə) [Lat.,=pore bearer], animal phylum consisting of the organisms commonly called sponge. It is the only phylum of the animal subkingdom Parazoa and represents the least evolutionarily advanced group of the animal kingdom. All adult sponges are sessile (nonmotile), and nearly all are marine; there are four families of freshwater sponges. Sponges are subdivided into three classes.
Sponges
The kitchen. Porifera are sponges.
Sponges
sponge
The phylum Porifera, which includes sponges, is considered to be the least complex in terms of organization and cell specialization. Sponges lack true tissues and organs, making them simple in structure compared to other animal phyla.
If you used a natural sponge, you used an animal from the phylum Porifera, which is the sponge phylum.
pore bearing animal.
Choanoflagellites
sheep
Sponges are animals of the phylum Porifera.
Sponges found in the phylum Porifera.