Huntingford FA, Adams CE, Braithwaite VA, Kadri S, Pottinger TG, Sandoe P & Turnbull J (2006) Current Issues in Fish Welfare. Journal of Fish Biology, 68 (2), pp. 332-372. https://doi.org/10.1111/j.0022-1112.2006.001046.x
First paragraph: Human beings may affect the welfare of fish through fisheries, aquaculture and a number of other activities. There is no agreement on just how to weigh the concern for welfare of fish against the human interests involved, but ethical frameworks exist that suggest how this might be approached.
Journal of Fish Biology: Volume 68, Issue 2