Use big mesh cast nets to target large bait fish like mullets and smaller ones for tiny bits like minnows. You can always use smaller mesh nets to catch bigger bait fish but that's not practical because the smaller mesh creates more resistance in water therefore the net will sink slower and thus allowing bigger bait fish to get away.

Here in Florida, a good bait net to get is a 1/4" minnow net for standard bait fish like greenbacks and sardines but you will not gill them when you encounter smaller sized baits which are abundant.

• Fitec GS-1000 Ultra Spreader Shrimp Cast Net #12010

  10 ft. radius 1/2 in. square mesh 1.0 lb. of lead per ft.
  

  This easy to throw and well made 10' shrimp net is back in stock. Catch shrimp and other bottom dwelling baits with ease and enjoy the rewards! Get your before it runs out.

• GS-1000 Ultra Spreader 8 ft. Shrimp Net #11780,

  8 ft. radius ⅝ in. square mesh 1.0 lb. of lead per ft.
  

  This popular shrimp cast net is back in stock! Features 1 lb of lead per foot, 8' radius, easy to throw and taped bottom keeps net open longer. Get yours today!

• Bait Buster 8' Glass Minnow Cast Net CBT-BGM8

  8 ft. radius 3/16 in. square mesh 1.5 lb. of lead per ft.
  

  This 8' glass minnow net is a solid choice for those looking to catch small baits! Weighs in at about 15 pounds total, it's easy to handle and sinks fast for maximum catch.

• 6 ft. Bait Buster Minnow Cast Net CBT-BBM6

  6 ft. radius ¼ in. square mesh 1.5 lb. of lead per ft.
  

  This 6' version of Bait Buster's minnow nets is fast sinking while much easier to handle. An excellent choice for beginners or experienced throwers that appreciate lighter overall weight that's easier on the body. This net has 1/4" square mesh, an ideal mesh for many to keep what you want and not gill smaller species which we all know is a pain to clean.