“…In addition to the above mentioned, fish rearing conditions also include feed (quality and feeding level) and feeding practice (number of daily meals and time intervals between meals), rearing density (number of specimens or weight of fish per m 3 of rearing water), mono and poly-culture rearing, water flow rate, lighting conditions (photoperiod, light colour, and intensity), and noise, sound, and possibly music transmission (Boeuf and Le Bail 1999;Ellis et al 2002;Karakatsouli et al 2006aKarakatsouli et al , b, 2007aKarakatsouli et al , b, 2008Papoutsoglou 2002;Papoutsoglou and Papaparaskeva-Papoutsoglou 1978;Papoutsoglou et al 1992Papoutsoglou et al , 2001Papoutsoglou et al , 2005aPapoutsoglou et al , b, 2006Popper 2003;Popper et al 2007;Scholz and Ladich 2006;Smith et al 2004;Willis et al 2002;Wysocki et al 2007). It should also be emphasised that although studies related to the effect of most rearing conditions on farmed fish physiology have, for almost the last 50 years, been of international concern, studies on the possible effect of music seem to be in their early stages (Papoutsoglou 2005;Papoutsoglou et al 2007Papoutsoglou et al , 2008.…”