Sponges are multicellular organisms consisting of jelly-like mesohyl sandwiched between two thin layers of cells, and usually have tube-like bodies full of pores and channels that allow water to …

Dec 7, 2025 · sponge, any of the primitive multicellular aquatic animals that constitute the phylum Porifera. They number approximately 5,000 described species and inhabit all seas, where they …

While sponges, like corals, are immobile aquatic invertebrates, they are otherwise completely different organisms with distinct anatomy, feeding methods, and reproductive processes.

Sponges may be of varied colours and their shape depends upon the sites of their stay. The largest sponge is Spheciospongia vesparum having a diameter of two metres.

Apr 30, 2025 · Sponges are primitive animals with no organs, living mostly in marine environments. There are three main sponge types: glass sponges, demosponges, and …

Aug 6, 2025 · Sponges are one of the simplest, and perhaps oldest, animals on the entire planet. They are marine animals that are easily mistaken for plant life due to their lack of a nervous …

Jul 30, 2025 · Sponges, classified under the phylum Porifera, are aquatic animals. They are among the earliest divergences in the animal kingdom, with fossil records dating back …