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.
I also think that the fish on the first picture is not a L59, and the reddish appearing spines is just because of the reflex of the material (very tiny odontodes) which are covering the front of the spines. This can mostly be seen only viewing from the front. A picture made from the side should not show this reddish shine. I also would say its a L183 (A.dolichopterus, if Ingo is right).
The third fish is Ancistomus sabaji (as I would place it), if its a L75/LDA2, L124 or L301 can't be said without knowing its findplace, right?