I've been catching these for the past 20 minutes, just for the money. My skill is 26 + 2, and I'm using a Halcyon Rod + Shrimp Lure, in Windurst Waters. I wasn't expecting to skill up on these, seeing as how they're 30 skill levels above me, but I just now gained two skill-ups from them.
So, it's quite possible to both skill-up and cash-out on these guys at lower levels. My bite rate is just a bit lower than my bite rate on Pipira, which I was previously skilling up on.