adult sponges. a. have body walls with many pores. b. possess true tissues. c. are active swimmers. d. use stinging cells to capture prey.
Sponges are multi-cellular. They are known be diploblast, which means having two layers of cells (Dawkins 2004). As an adult they may have multiple cell layers .
Sponges, the members of the phylum Porifera are a basal Metazoa (animal) clade as a sister of .. Although adult sponges are fundamentally sessile animals , some marine and freshwater species can move across the sea bed at speeds of 1–4.