Sponges
phylum porifera
porifera
Porifera
The Porifera, or sponges
All sponges belong to the phylum Porifera.
Phyla such as Porifera (sponges) lack organs and have asymmetrical or no specific body symmetry. Another example is Placozoa, which also lack organs and have asymmetrical body shapes.
porifera & echinodermata
No, they are sponges. Actually they are the only animal phyla that does not have any "true tissues".
All invertebrates except Porifera possess nervous system .
Animals of Phylum Porifera, commonly known as sponges, are distinct from the other nine major animal phyla in several key ways. They lack true tissues and organs, exhibiting a simple body structure made up of specialized cells that perform various functions, such as filtering water and obtaining nutrients. Unlike most other phyla, sponges are primarily sessile, meaning they remain fixed in one place, and they rely on a water flow system for feeding and respiration. Additionally, Porifera reproduce both sexually and asexually, a feature that is less common in many of the other phyla.
Sponge phyla primarily include Porifera, which contains various classes and species of sponges. Other members of the animal kingdom that are related to sponges, albeit not within the same phylum, include members of phyla such as Cnidaria, which includes jellyfish and corals, and Ctenophora, known as comb jellies. Both of these phyla share some primitive characteristics with sponges but are distinct groups with their own unique features.
Asexual reproduction through gamules occurs in the phyla Porifera (sponges) and Cnidaria (corals, jellyfish, etc.). Gamules are specialized reproductive cells that are released from the parent organism and develop into new individuals without fertilization.