Unlike well-characterized HSPs such as HSP70, little knowledge is available regarding the cofactor HSP40 in crustaceans, despite the fact that the responses of HSP40 to environmental stress and pathogenic infection have been described in some non-crustacean aquatic species, such as the halibut Paralichthys olivaceus (Dong et al., 2006), clam Venerupis philippinarum (Li et al., 2011) and oyster Pinctada martensii (Li J. et al., 2016). This evidence concerns the gene DNAJB1 and infection.