This loach is a one fish wrecking crew. I dare say a large blue loach could easily handle most monster fish with ease. Those eye spikes are outrageous!
Mine have straight up killed other fish before with their constant pestering and biting. Eventually the nips and stress just wear the other fish out. Now they're the only bottom feeders in that tank.
I've got 4 modesta in with 5 yoyo's along with 3 SD's and a KKP and GT in a 75gal and they stick to themselves.
I will be combining tanks soon into a 180gal, so the loaches above will meet another 3 yoyo's. LFS has a few larger sized modesta that I may have to bargain for when I move to the larger tank.