Based on analyses of
scales from highly relevant species for aquaculture such as common carp (Cyprinus carpio), gilthead
sea bream (Sparus aurata),
sea bass (Dicentrarchus labrax), Mozambique tilapia (Oreochromis mossambicus), Atlantic salmon (Salmo salar), rainbow trout (Oncorhynchus mykiss) and pike perch (Stizostedion lucioperca) as well as from fish commonly used in experimental studies such as zebrafish (Danio rerio), it was found that glucocorticoids, especially cortisol, incorporate in fish
scales over time.