Mr. Wels is definitely my favourite fish on MFK, and has been for a long time....so much so that I start to take him for granted, but I always check out this thread when it pops up. The single sentence you wrote in this last post really caught my eye and made me wait for the video to load; not very often I do that. I was worried for Mr. Wels!
Those soft floppy nets are way more prone to damage from teeth than the stiffer nylon ones. A fish flopping around in the soft net can easily get a bunch of the fabric into his mouth and do some damage if he has teeth; I'm thinking here mostly of Pike and Muskie, which sometimes seem to just blast right through what appears to be a solid net with hardly any resistance. I think those external teeth on the leerii would be at least as bad as Esox teeth. The stiffer nets are less liable to actually get into the mouth and are more resistant to cutting when they do.
I have moved entirely towards rubber-covered nets; they seem to be much easier on the slime coat than the older styles. Plus, scooping a fish into a rubberized net is less like slipping a flippy, floppy bag over it and more like scooping it into a flexible collander; way yes chance of getting the material bitten. Sadly, there seems to be quite a range in quality and it's hard to tell good from bad. I have a couple that are almost like new after lots of use on Wallleye, which are very toothy, prickly fish...but I have one that failed on maybe the third outing. It was admittedly a cheapie, and more evidence in support of "you get what you pay for!"
The rubber makes the netting easier on the fish...but it also seems to allow the makers to use any crappy material they want before coating it. Buyer beware!
PS: does Mr. Wels still have
carte blanche to eat any tankmates he wants with impunity?
I hope so...