![]() Some sponges grow in thin encrusting layers over surfaces (Fig. All adult sponges are sessile, meaning they live permanently attached to rocks or other submerged objects and do not move about on their own. They are found in shallow ocean environments to depths as great as five kilometers (km). Although the majority of sponges are marine, some species live in freshwater lakes and streams. Sponges are simple invertebrate animals that live in aquatic habitats. Chesapeake Bay: Nature of the Estuary, A Field Guide by Christopher P.The phylum Porifera comprises the sponges.Life in the Chesapeake Bay by Alice Jane Lippson and Robert L.Sponges provide important habitat for shrimp, worms, crabs and other small Bay creatures.Red beard sponges cannot survive if taken out of water.Red beard sponges are the most common sponge in the Chesapeake Bay. Young sponges are usually thin and flat, rather than thick and branching. ![]() Free-swimming larvae eventually settle to the bottom, where they find a hard surface to attach themselves to. During sexual reproduction, eggs are fertilized within the sponge. The sponge fragments bud into new sponges. Asexual reproduction takes place when branches are damaged or broken off. These sponges reproduce both sexually and asexually. Unused water and waste products exit through another opening at the top of the sponge. Beating, hair-like cilia capture food particles in the water. ![]() Red beard sponges are filter feeders that feed by drawing water through their pores into their chambers.
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