Is my 6-7 month old Axolotl too small?

[AxieFantasy]

This is my Axolotl, I don’t know his exact age but since the breeder said he was born sometime in December, I’m assuming he’s 6, maybe almost 7 months old. I feed him a cube of bloodworms every night, sometimes I feed him live blackworms. I don’t know if he is too small though, does he look too small for his estimated age? I put my thumb for reference (I would’ve used both but I was holding the camera, when I use both he’s the same size as the space in between both my thumbs)

 

[wolfen]

This is my Axolotl, I don’t know his exact age but since the breeder said he was born sometime in December, I’m assuming he’s 6, maybe almost 7 months old. I feed him a cube of bloodworms every night, sometimes I feed him live blackworms. I don’t know if he is too small though, does he look too small for his estimated age? I put my thumb for reference (I would’ve used both but I was holding the camera, when I use both he’s the same size as the space in between both my thumbs)

just like most other animals axolotls can grow at different rates, sometimes the ones that take the longest to grow end up being larger than the others and sometimes they don't, it is one of the reasons it is so hard to gauge the age of an axolotl based on it's size.
there's no noticeable issues or deformities so just enjoy him being small while you can.