i had a older fellow ask me...."what are you gonna do with the rest of your fish" after I was done with the filets and checks! I said " what fish", he then took out the two lower fins, and said this fish....... I now cut them out, an usually grill them/blacken them that day as an app. while grilling other items.
There is usually a nice chuck of meat left, like a chicken wing. I think its a taste between the check and filet...