Taken together it shows the notion that the axolotls are deliberately ingesting gravel as gastroliths.
Julio Cortazar was a prominent figure in the Latin American Boom, a flourishing of literature and art during the 1960s and 70s.
This is peculiar to axolotls, while other salamanders have a considerably more extensive range.
The more you learn, the better the habitat and attention you can give to these animals.
And there are two things that cause a bit of a conflict to me.
A hidden reference to the god Xototl in the series finale does not make the salamander important to the Gravity Falls show.
Axolotls exposed to temperatures above 74° F 23° C will develop heat stress.
However, I disagree with the photo being used as evidence to imply that aquarium gravel is a safe substrate for axolotls.