Nothing top secret, simply didn't think it was ready for pictures. Since you requested pictures, I added two images: the recently completed fish shed and an external, silver-channel cat tank.
When completed, the high tunnel will extend from the shed and shelter 1 - 3 plant troughs. The Tilapia, once we're licensed, will go in the shed tank for temperature control.
If all goes well, we'll add troughs and bays until each bay supports one high tunnel sheltering three troughs each. My guess, we'll be 36 months down the road before seeing that capability.
The catfish - they're breeding stock that will remain outside.
Jim