Tilapia, because the grow-out plan is very well documented. I'd happily sacrifice growth rate for a fish with higher "desirability" factor, and perhaps a lower optimal temperature. I previously tried Bluegill and lost them, I think, due to stress from temperature variation. I'd like to try them again or go with Catfish. Catfish are the top species (for food, by weight) produced in the US, and they seem nearly as durable as Tilapia in small systems.

The pescalators sound great. There are so many tools like that where the application specifics ( species, system, life stage ) could make room for a scalpel-precise optimization of some tool, but the benefits would have to come from scale, and there just haven't been many first-movers ( or they keep quiet and defend the moat ) who seem poised to raise the tide for the whole industry. It is very ripe for the work you are doing to help the downstream gains over generations of stocks.

Cheers to you guys!