Sponge - Wikipedia
They are sessile filter feeders that are bound to the seabed, and are one of the most ancient members of macrobenthos, with many historical species being important reef -building …
What is a sponge? - NOAA's National Ocean Service
Sponges — simple aquatic animals with dense, yet porous, skeletons — are highly adapted to their environments. A variety of sponges dot the seascape of Flower Garden Banks National …
Sea Sponge: Interesting Facts with Pictures - Ocean Info
Sea sponges are primarily found in saltwater environments. Some freshwater variations do exist, but a large proportion is sea-based. Many coral reefs contain a variety of sponges, as they can …
Sea Sponge - Description, Habitat, Image, Diet, and ...
Among the most ancient and often overlooked inhabitants are the sea sponges. Far from being mere plants or inert rocks, these fascinating creatures represent some of the earliest forms of …
Sponge | Definition, Features, Reproduction, & Facts | Britannica
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 …
What Are Sea Sponges? A Look at the Simple Animal
Jul 20, 2025 · Sea sponges are among the most ancient and simple multicellular animals on Earth, with a fossil record dating back approximately 600 million years. For a long time, they …
Sponge Facts and Species Information with Pictures
This section contains a collection of sea sponge facts with detailed information about where they are found, what they eat, and how these fascinating marine invertebrate animals reproduce.