The Lee Fisher Cast Net is the most economic tool for catching your own bait. You can also use a cast net to catch shrimp, larger fish, mullet, etc.
Made from nylon monofilament
Has a hand line: rope attached to the swivel on one end
7 foot in diameter
For use with bait 3 inches to 6 inches in size
Has a net break strength of 7 to 15 pounds