how come some animals are huge as babies, but small as adults?

Most invertebrate larvae are going to be relative in size to the adults. Generally larva serve as a resource gathering stage and adults as a gene propegation stage. If a baby animal is bigger than the adult it is for whatever reason because it helps it reach a stage where it can fuck. I don't know of any actual examples of this happening.

A larva's body is mostly fat storage. It's all energy for the metamorphosis.

okay, thanks.

>>2260086
This probably doesn't help but I was a fat kid and now I am a smaller adult because I learned to manage my eating. Maybe grub worms just have no self control.

>>2260105
Axolotl

>>2261014
Axolotl do not reach their adult state though.

>>2261026
You can force them to, but they aren't any smaller afaik.

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54KB, 576x467px

>>2260105
https://en.wikipedia.org/wiki/Pseudis_paradoxa
there's this frog that is bigger as a tadpole than as an adult