Talk:Crashfish/@comment-76.216.123.156-20170127043218

Filling a bioreactor completely with these buggers will produce as much as a whopping 6400 energy in total. While the machine does cap production at 100 energy at any given time, the fish will be biodegraded on-demand so no potential energy is lost.

Each hatched crashfish supplies 400 energy, yet only takes up a single 1x1 slot. This means you could stuff 16 of these in. So, I believe this is the most compact and effective source of energy from my experience, as long as you keep an aquarium of them next to the machine.