Anthozoans exhibit great powers of regeneration; lost parts swiftly regrow and the sea anemone "Aiptasia pallida" can be vivisected in the laboratory and then returned to the aquarium where it will heal. They are capable of a variety of asexual means of reproduction including fragmentation, longitudinal and transverse fission and budding. Sea anemones for example can crawl across a surface leaving behind them detached pieces of the pedal disc which develop into new clonal individuals. "Anthopleura" species divide longitudinally, pulling themselves apart, resulting in groups of individuals with identical colouring and patterning. Transverse fission is less common, but occurs in "Anthopleura stellula" and "Gonactinia prolifera", with a rudimentary band of tentacles appearing on the column before the sea anemone tears itself apart. Zoanthids are capable of budding off new individuals.