Rectangular hatch?

[SoCalEDC]

in regards to the bait well issue, you can buy or build a live well (buiding is much less expensive, around 100 bucks for the parts, which includes the hoses, pump, vittles vault container, and battery).

I use a bait tube, which works pretty well but it adds drag to the kayak. its an ABS tube with drag fittings on either end so water flows through it. it keeps the fish alive all day. I had a 4" and lost it, bumped up to 6". pros and cons are that the 4" didn't allow big macs to turn around easily, so if you put them in they have to be facing forward (go in tail first) so that they don't get dragged backwards. The 6" creates far more drag and is harder to store on deck.

If you decide to go this route just make sure you use ABS pipe and not pvc as pvc will sink creating even more drag, and making it difficult to access your baits when needed.