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.
My guess would be a C. schwartzi--they do not always have black extending into the dorsal fin. Or the one shown in Ian Fuller's (Coryman) book, on identifying corys, as Corydoras cf. schwartz, on p. 229.