List out four salient features of Phylum Porifera.

Explanation

The following are the salient features of Phylum Porifera.
(1) Sponges are multicellular animals. Their cells are not integrated to form tissue. Thus these exhibit cellular grade of body construction only.
(2) They are aquatic, and sedentary in habit . Majortity of sponges are marine and inhabbit from shallow waters to a depth of 5,600 metres in oceanic water. A few are fresh water inhabitants.
(3) They may be solitary or colonial . The size and the shape a considerably , among members of different groups .
(4) There are numberious opening all over the body called ostia or dermal pores through which , water enters the body.