A coworker and I were fishing a pond at work. He caught a channel cat and when I was filleting it, I noticed I qas having a hard time. The fillet was mushy did not feel firm like the bass and flathead I had filleted before the channel cat. Is that normal or was there something wrong with the fish? I can't even remember the last time I filleted a channel cat so I have no point of reference other than comparing it to every other species I do catch regularly. Thanks in advance.