Question

What are the animals belonging to the following phylum commonly called Porifera, Platyhelminthes, Nematoda, Arthropoda, Echinodermata

Answer 1

They are called Invertebrates.
I'm not sure about the answer though.

Answer 2

Answer:

Porifera. Sponges (Phylum Porifera) are a group of simple aquatic invertebrates that include three groups - Glass sponges, Demosponges and Calcareous sponges.