Sea sponges are simple aquatic animals that belong to the phylum Porifera. They are primarily found in oceans, but some species can also live in freshwater. Sponges have porous bodies, allowing water to flow through them, which helps them filter food particles and oxygen from the water. They come in various shapes, sizes, and colors, and can be found attached to rocks or coral reefs. Unlike most animals, sea sponges lack true tissues and organs. They reproduce both sexually and asexually, with some species capable of regenerating lost parts. Sponges play a vital role in marine ecosystems by providing habitat for other organisms and helping to maintain water quality.