Phoronids are small, marine invertebrates belonging to the phylum Phoronida. They typically live in shallow waters and are known for their tube-like structures, which they use for protection and to anchor themselves to the sea floor. Phoronids have a simple body plan, featuring a lophophore, a crown of tentacles used for feeding and respiration. These creatures are primarily filter feeders, capturing plankton and organic particles from the water. Phoronids are often found in colonies, and their presence can indicate healthy marine ecosystems. They play a role in nutrient cycling and contribute to the biodiversity of their habitats.