Urochorda is a scientific term used to describe a phylum of marine invertebrates that includes tunicates, also known as sea squirts. Tunicates are characterized by their sac-like body structure and a tough outer layer called a tunic. In terms of synonyms, Urochorda is often interchangeably referred to as Tunicata or Ascidians. Ascidians also feature a long, retractable siphon for feeding and elimination, and they are often found attached to rocks, coral, or other hard surfaces in shallow and deep ocean waters. Other synonyms for Urochorda include sea quirts, sea tulips, and tunicates. Despite the varied names, these fascinating and unique creatures continue to captivate scientists and nature enthusiasts alike.