In any case, there has a lively debate over fish consciousness, mostly focusing on the issue of whether fish can experience pain, stress and suffering (see below, section 7.1; see also Rose (2002) and Sneddon et al. (2003) for contrasting views of conscious pain in fish; Allen 2013 and Brown 2015 for reviews of fish cognition and consciousness as it may relate to pain; and Braithwaite 2010 for a book-length treatment). This is of special relevance in the context of welfare regulation in commercial aquaculture and recreational angling; accordingly, the fish consciousness literature has focused experimentally on salmonids (especially salmon and trout), a group of high commercial and sport-fishing importance, but only a tiny phylogenetic corner of the animals that colloquially count as fish. 