Are sponges diploblastic or not?

Members of Phyllis proifera are diploblastic .i.e, they have only two germ layers but these germ layers aren't endoderm and ectoderm. The germ layers present in them are called 1. Pinnacoderm (or dermal layer) -outercellular layer 2. read more

Sponges, or the phylum Porifera do not have true tissues. They are metazoa at their cellular grade of construction, not eumetazoa. If you look at phylogenic tree, you will see that sponges are not directly related to cnidarians, which are radial symmetric and diploblastic. read more

Start studying Ch. 31: Sponges & Diploblastic Animals. Learn vocabulary, terms, and more with flashcards, games, and other study tools. read more

They have two layers of cells but not do not have distinct tissues (although they have differentiated cell types). They also don't have symmetry but I have seen them referred to sometimes as diploblasts. read more