. "Any net, pound, or other means or device for taking or capturing fish, or whereby they may be taken or captured, set, put, floated, had, found, or maintained in or upon any of the waters of this state, or upon the shores of or islands in any of the waters of this state, in violation of any existing or hereafter enacted statutes or laws for the protection of fish, is hereby declared to be and is a" . . . .