The effects of galactooligosaccharide (GOS) and varying levels Lactobacillus plantarum (LP) on some physiological parameters as well air exposure stress resistance in clawed crayfish (Pontastacus leptodactylus) were investigated. During a 97-day trial, 216 fed with four experimental diets (in triplicates) including the control diet (without GOS LP), GLP7 (GOS 2%+LP 107 CFU.g-1 diet), GLP8 108 G...