Durken was shocked, "Just a tiny flea creature, that's enough for you to fill your teeth? Does it fill you up?"
The giant snake shook its head pitifully, "No, I can only eat two and then go to sleep, I'm starved."
Turns out it was relying on hibernation to delay its hunger. If it eats a few and then goes to sleep, bringing its life metabolism to the lowest, it will wake up the next time with the flea creature numbers having replenished.
But isn't that way of living too stifling? Like only being able to eat once a day, scraping only a mouthful each meal, a lot of people would starve to madness. It's hard to control oneself not to gulp down the flea creatures and flame rabbits all at once.
But the giant snake managed to control itself, as did the flea creatures. Because those who couldn't control themselves are already gone. In an environment of extreme food scarcity, there must have been brutal elimination to reach the current balance.