Those bony fishes swim in the deeper parts of the underwaters parts of the caves. Hunting for axolotls and fishes, their predatory instincts fortunately lack the intelligence to check alguaes and the flora.
Using this to their advantage, axolotls can survive another day. Their dark skin allows them to blend into the poorly lit lakes and rivers that sprawls underground. Giving chase to their prey, they swim fast enough to catch even the fastest fishes. Hidding from moray eels is the only chance of survival underwater, so stay sharp!