Also, as a side note, the Salmonids aren’t some mindless horde. They’re more akin to Raiders in Fallout, ones who essentially have adopted Rules of Nature as their theme song: to Salmonids, being eaten is part of the circle of life, same as eating. As such, they aspire to make their death as delicious as possible, whenever it may come

Exaggerated for fun, as you probably know the series is set after the extinction of humanity, although the salmonid threat is pretty much an annoyance, at least lore-wise, there isn't really much indication that things are getting bad, outside of the destruction attempts from the villains in octoexpansion and the third game, which are stopped.