Agree with leiarius marmoratusLooks like a juvenile achara catfish.
Marble salfin catfish
Just a Marbled Pim Catfish, no sailfin. P. perruno is indistinguishable by a layman from L. marmoratus / longibarbis, plus has never been in the trade for decades, no export from Lake Maracaibo.
I wish it wasMarble salfin catfish