Characteristics of porifera:
→These have pores or holes all over the body.
→These are non motile animals attached to some solid support.
→These have pores which leads to a canal system that helps in circulating water throughout the body to bring in food and oxygen.
→The body of porifera has design which involves very minimal differentiation and division into tissues.
→These animals are covered with a hard outside layer or skeleton.
→These are commonly called as sponges.
→These are mainly found in marine habitat.
→Examples:sycon, spongilla, etc.
Hope this helps you