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 circulate through them.

Sponges are animals with dense skeletons that are highly adapted to their environments, although it is easy to see why they may be mistaken for plants. Sponges are found in a wide variety of colors, shapes, and sizes – and scientists believe that the colors of the sponge may act as a protection from the sun’s harmful UV rays.

Mar 22, 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 occur attached to surfaces from the intertidal zone to depths of …

Sponges are multicellular organisms belonging to the phylum Porifera. They are one of the simplest and oldest forms of animals on Earth. Sponges are considered animals because they are multicellular and lack cell walls, which distinguishes them from plants and fungi.

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Demosponges or common sponges are sponges of the class Demospongiae (from Ancient Greek: δῆμος, romanized: dêmos, lit. 'common people' + σπογγιά, spongiá, 'sponge'), the most diverse group in the phylum Porifera which include greater than 90% of all extant sponges with nearly 8,800 species worldwide (according to the World Porifera Database). [5] .

The phylum Porifera comprises the sponges. Sponges are simple invertebrate animals that live in aquatic habitats. Although the majority of sponges are marine, some species live in freshwater lakes and streams. They are found in shallow ocean environments to depths as great as five kilometers (km).

Sponges are a di­verse group of some­times com­mon types, with about 5000 species known across the world. Sponges are pri­mar­ily ma­rine, but around 150 species live in fresh water.

Dec 30, 2024 · Sea sponges, scientifically known as Porifera, are among the oldest and simplest multicellular animals on Earth. These remarkable filter feeders have thrived in marine environments for over 500 million years, surviving multiple mass extinctions through their adaptable nature.

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.