Yes this is based on the axolotl in Minecraft.
The small one is about 3 inches long, whereas the larger one is about a foot long.

If you want to make a bigger one, conversions are below:

Super Bulky- 6 mm (J) hook
Jumbo- 11.5 mm hook

UPDATE 3/23/2025- I’ve updated the pattern to make it a bit nicer to look at, and hopefully easier to understand.