Some affirm that the same phenomenon is observable with
serpents as with swallow chicks; in other words, they say that if
you prick out a serpent's eyes they will grow again. And further,
the tails of saurians and of serpents, if they be cut off, will grow
again.

With fishes the properties of the gut and stomach are similar;
that is, they have a stomach single and simple, but variable in
shape according to species. For in some cases the stomach is
gut-shaped, as with the scarus, or parrot-fish; which fish, by the
way, appears to be the only fish that chews the cud. And the whole
length of the gut is simple, and if it have a reduplication or kink it
loosens out again into a simple form.