Did you know fantastic help is an anagram of Planet Catfish? This forum is for those of you with pictures of your catfish who are looking for help identifying them. There are many here to help and a firm ID is the first step towards keeping your catfish in the best conditions.
Hello and welcome to PC.
It's certainly not a blue whale catfish. It's a Pimelodid of some kind, possibly Rhamdia.
I've never seen this species and at first glance it looks like an African species, but it lacks the nasal barbels.