The detrimental effect on mechanical properties of FA grade surimi gels might be associated with a disruptive effect of the
gelatin during the formation of the three-dimensional structure by the myofibrillar protein interactions during the gelling phenomenon. This three-dimensional structure is responsible for the mechanical properties. Other feasible explanations for the failure of the fish gelatin to improve the mechanical properties seems to be related with the failure of fish gelatin to improve WHC, promoting a higher number of myofibrillar protein–water interactions and inhibiting the myofibrillar protein–protein interactions.