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.
Did you visit South-America lately?
All I can say at the moment is that species 4 is a juvenile specimen of species 3 imo. They could be Hassar wilderi. Have a look in the Cat-eLog.