View all references for Sea squirts, fish, reptiles, birds and mammals (phylum Chordata)
(2000). FishBase. A global information system on fishes. [On-line] http://www.fishbase.org, 2001-05-03 00:00:00
(2001). Photographic guide to the sea and seashore life of Britain and north-west Europe. Oxford: Oxford University Press.
(1997). The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]
(1969). The fishes of the British Isles and north-west Europe. London: Macmillan.