Native
C. cylindracea has an elongated, smooth, rounded shape, up to about 24 mm. The peduncle of the uropods is extended, equalling the length of the triangular pleotelson (which is finely serrated and setose). The first pleopods are chitinised, forming a hard covering for the other pleopods. It has small eyes and short antennae, and is typically mottled with orange on a white background.
This species is a sublittoral scavenger which lives in shell gravel. It is typically found on bait and in crab and lobster pots in deeper southern and western waters.
Naylor, E. & A. Brandt. 2015. Intertidal Marine Isopods. Synopses of the British Fauna (New Series), No. 3. Field Studies Council, for The Linnean Society of London.
World Register of Marine Species (WoRMS): https://www.marinespecies.org/aphia.php?p=taxdetails&id=118842
Aphotomarine: https://www.aphotomarine.com/isopoda_conilera_cylindracea.html
Ocean Biodiversity Information System (OBIS) distribution map: https://mapper.obis.org/?taxonid=118842
