Yea, I've not heard of that, and the few I've kept I've not seen it, but I suppose it could be because I didn't keep them in conditions necessary for it. Same as arowana. Didn't think air breathing was such a common thing amongst the fish we keep lol. Especially with the swim bladder issues many experience.
Golds grow to 16". All wolves breath atmospheric air. As far as the crawling on land, they're not good at it lol, many who keep wolves don't believe that including myself, but my wooden floor may not be as grip-able as some grass, I just don't see them going over any hill. But both are very infrequent. I've had common plecos, they took more gulps of air than any of my wolves, but still didn't do it often. Tank temp is always between 72-80 (wolves always break the heater). The waters below the filter, and I do have a bubbler to help with service agitation and dissolve some oxygen. I'd say my tank is well oxygenated...
Only ever kept common, could be a number of species from my understanding. Mine was darker not sure if that narrows it. But I do have a dark substrate, always have.
No. They'll all come up for a breath of air. Common times are when stressed out after a fight kind of thing or of course when there's a lack of oxygen. All wolves do it. If you stare long enough you'll see them do it without needing to as well. It just takes forever. My current gold and erythrinus eat pellets off of the top and bottom, usually after they fill themselves up they go for air.
