most catfish are - however pictus are more middle bottom.
They really swim at all levels but spend a lot less time picking through your gravel then most cats.
get three or more and they'll also adjust to a daytime schedule.
Raphaels pick a spot and hang out, I also have a (SA) bumble bee cat in with my Midas he seems to have very similar habits to a Raphael except he's alot more active (and colorful). He's really growing on me and he swims around the bottom like a little midget cat shark prowling.