I looked on eBay to see what Bullhead Catfish are selling for. They sell for $25 plus shipping.
I told the wife, we should catch them and kill two birds with one stone.
Make a few extra bucks and lower bullhead population, LOL
The time to collect them is "right about now". You should start seeing little schools of the young here shortly.
The largest BH I ever caught was a Yellow BH around 14" but BH can get considerably larger than that. Even so, it isn't common. Water that produces 12" BH is good water where population balance is good. For me the best BH for eating are in the 8" to 10" lengths. My grandfather had a pond with blacks but the upper limit of his was 10". He kept any BH 6" or longer and they were very good to eat rolled in cornmeal and fried in bacon fat with farm fresh eggs for breakfast. Great memories.
This is how he cleaned them:
https://www.youtube.com/watch?v=7RjEUSkdks4