I've had a quick google and they do appear to be a freshwater species with the ability to survive in salt water long enough to spawn in the spring and summer months:clap3:,That's how it all started in the Ebro, i think it was some German anglers introduced a few babies, after about 10 years, they'd completely taken over, there's little else in the Ebro now other than Cats and large Carp, the big cats will take VERY LARGE Carp, whole.
I *thought* Wels Catfish were fresh water only, but if that one came from salt water, they must either be able to adapt or survive in Salt water, maybe only for a short time and the one(s) caught came in from the freshwater rivers and survuved long enough to get caught, I dunno
You're right Bob, there are.i think there is more catfish about in our river systems than we realise..
Get a dead roach on the end and see if you can hook himi fish a fen river... ( not drain ) for carp.. water very clear.. and twice in 3 trips have had a cat of about 40lb hanging on the end of my spud rod while baiting up early morning.. the drainage board also find them in smaller drains..
the one,s up at hessel could come from mile,s in land...