A few people have mention that Carbon Rod doesn't work. I'd like to point that out as being wrong! I've used the Carbon Rod to fish up about 100 of these and haven't had any breaks. Maybe I was lucky? I've talked to other people that were at the pond and they too were using Carbon Rods! Just FYI...
I used halcy rod and worm lure, sinking minnow and minnow (I lost some when I got "bad feeling" -> line broke). I did not break a single rod or try to pull in any !!! as they are items that will break the rod. Fished here about four hours at crystal pond (j-9) jug. forest and had to zone a couple times for fatigue reasons. Occassionaly I would get about 9 "no catch" statements in a row but this was a good skill up fish from 32-35 as it is the only fish you catch with this combo here. I counted catches and went no more than 14 without a skill-up and sometimes back to back. In the end I got ~9 stax of fish and skilled 3 lvls. (108 fish / 30 skills = a skill ~ every 4 fish. Of course this doesn't account for .2's, just an average.).
You can use a Glass Fiber Rod to catch these. Also, you can catch them at lower levels. I cought them at level 1 fishing without any improvement gear. I think the bait I used was insect ball, but I honestly don't remember.