“…It has been reported in different studies that various factors like contaminated environmental parameters, light intensity, types of feeding during larval stages, endocrine hormones are responsible for body colour patterns and genetic factors including random genetic alteration, genetic alteration due to small population size are considered to cause colour abnormality in fishes (Tokac, Akyol, Aydin, & Ulas, 2013;Kadir et al, 2015). However, with respect to the location of the specimen caught, factors like heavy metals contamination in water and light intensity could be potentially excluded from the probable factors to cause colour change, because the open ocean is not generally contaminated and the species is a pelagic fish, thus light may not be an issue.…”