A catfish that size is a real catch-and-release dilemma. On the one hand, it's an old, old animal, and probably worthless as food. On the other hand, it's a big damn catfish, and hardly a member of an endangered species.
I caught my first trophy-sized largemouth last weekend. ..five plus pounds and as long as my forearm (er, that'd be a cubit, I suppose.) Anyway, I noticed it was a gravid female with the characteristic egg sac bulge and I turned 'er loose.
That catfish would have eaten my largemouth without so much as a passing belch.
Now, have you all seen the pictures of Hogzilla?