Barnacle Barnacle A barnacle is a type of arthropod constituting the infraclass Cirripedia in the subphylum Crustacea, and is hence related to crabs and lobsters. Barnacles are exclusively marine, and tend to live in shallow and tidal waters, typically in erosive settings. They are sessile (nonmotile) suspension feeders, and have two nektonic (active swimming) larval stages. Around 1,220 barnacle species are currently known. The name "Cirripedia" is Latin, meaning "curl-footed". The study of barnacles is called cirripedology. Barnacles are encrusters, attaching themselves permanently to a hard substrate. The most common, "acorn barnacles" (Sessilia), are sessile, growing their shells directly onto the
What Kind of Day Has It Been lines: What Kind of Day Has It Been "What Kind of Day Has It Been" is the 22nd episode of "The West Wing", the season finale of the show's first season. It originally aired on NBC May 17, 2000. Events circle around the attempted rescue of a US fighter pilot in Iraq, and the president taking part in a town hall meeting in Rosslyn, Virginia. The episode was written by Aaron Sorkin and directed by Thomas Schlamme. "What Kind of Day Has It Been" is also the name of the first-season finales of both the series "Sports Night" and "Studio