I used to trap chubs which are only Salt water minnows with an old glass milk bottle, a string , and some regular old bread crumbs, 1 st,,tie string around neck of bottle to desired length,,,2nd,,just add some bread crumbs in bottle , 3 rd submerge and watch them minnows swim in,, Pull string once minnows Swim in , and Bingo,,,you got some minnows,,,