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.

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 …

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 …

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 …

May 9, 2022 · Sponges help create habitat, filter particles from seawater, contribute to carbon, nitrogen, and silica cycling. They have also been used for bathing since ancient Egypt.