Phylum Brachiopoda is a term used to classify a group of small marine animals that are typically found on the ocean floor. Synonyms for this phylum include Lamp shells, bivalve molluscs, or Brachiopods. These animals are characterized by their symmetrical shells, which are divided into two halves, and they use their long tentacles to filter planktonic food from the water. Brachiopods are often confused with clams, but they differ in their anatomy and ecological significance. Over time, the classification of Brachiopods has undergone many changes, and researchers are constantly uncovering new information about the diversity and evolution of these unique creatures.