Big Fish Farms just finished a predation study on paddlefish (it's what I do!) and found that they are very easily eaten. I witnessed a 20" channel cat grab and gulp a 16" polydon spathula without breaking a sweat. Everybody loves the taste of paddlefish.
This species is fairly easy to keep in an aquarium environment providing you keep them with extremely docile tankmates and start out with runts.
We cull our runts every spring and fall and sell them to the aquaria trade. Used to be we just made fertilizer out of them because they will attack each other in an intensive aquaculture environment. We keep 15,000 per 100,000 gallon tank for grow-out to stock for caviar.