Thanks, I learned a new name! Funny that the only times I've ever heard of porthole were when Hoplo cats were spoken about.
Sturgeon catfish (speaking of pims) is only used for Platystomatichthys sturio, aka Fox Catfish http://www.planetcatfish.com/catelog/species.php?species_id=319 I can see the superficial similarities but upon closer examination it is not it - the position and shape of the dorsal, adipose, and caudal is different in the two fish.
Sturgeon catfish (speaking of pims) is only used for Platystomatichthys sturio, aka Fox Catfish http://www.planetcatfish.com/catelog/species.php?species_id=319 I can see the superficial similarities but upon closer examination it is not it - the position and shape of the dorsal, adipose, and caudal is different in the two fish.