Well I emailed the KDFWR and asked for an explanation on the "Hybrid Catfish" being stocked in FINs lakes, and here's the reply :

The hybrid catfish are a cross between a female channel catfish and male blue catfish. Pfeiffer Fish Hatchery, the state run hatchery in Frankfort produces all of the catfish for the FINs program (1-lb average 123,000 annually). They have been producing the hybrid catfish since 2014, with about 50% of the catfish stockings at FINs lakes now being split between channel catfish and the hybrid catfish in a typical year. The hybrid catfish have several benefits over straight channel catfish. The feed conversion is better, the fish grow more uniformly, and the hybrids are more disease resistant. They are also easier to seine when the hatchery harvests the ponds. The hybrid catfish are only stocked in FINs lakes. The private aquaculture industry has been using them for a number of years for human consumption due to the aforementioned benefits. Several other states are also starting to utilize hybrid catfish for stocking in urban impoundments.

Dane Balsman
Fisheries Program Coordinator - Urban Fisheries
Kentucky Department of Fish & Wildlife Resources