Jimbo, bunker (menhaden, pogies) are the #1 live bait here in the Carolinas. Flounder love the little ones, kings love the big ones, and hooked in the back, they are grouper candy.
They are not hardy, far from it.
Aeration will not work....the slime from their bodies turns the tank to a frothy mess and they quickly go belly-up.
You will need a 400 gal pump per 25 gallon recirculating livewell minimum for pogies.
Clamshell intake, pump, and overflow through/off the stern.