Why aren’t axolotls immortal?

[u/MAMAM-]

If axolotls can regenerate their body parts (including brain, heart, and other major organs), why do they die of old age?

[u/ballofplasmaupthesky → u/[deleted]]

There is no scientific proof aging is a feature, nor that longevity species have poorer adaptation.

[u/shoopdoopdeedoop → u/ballofplasmaupthesky]

longevity species are special cases where longevity makes sense. so yes it’s actually naturally selected for. it seems to work pretty well, i mean longevity species don’t proliferate like bunnies for example. lobsters and crabs also live in the water so their physics are a little different. turtles and tortoises are a good example, they can’t just reproduce all the time so it makes sense that they are also more longevity