How Fast Do Axolotls Grow? (And How Big Do They Get)

Axolotls grow at a steady pace but can vary depending on factors like habitat, diet, and genetics. Axolotls typically achieve their maximum size (around 12 inches) within the first 18 to 24 months of their life.

Axolotls, also known as Mexican walking fish, are renowned for their remarkable regenerative abilities and unique appearance. But do you ever wonder how fast they grow and how big they actually get?

In this post, we’ll explore the typical growth rate of axolotls and the factors that affect the growth rate of the fascinating creature. Let’s begin! 

Axolotl Growth Rate and Size Factors

In order to ensure the healthy growth of an axolotl, understanding the factors that influence its growth rate is vital. Some key factors affecting an axolotl’s growth rate include genetics, nutrition, and the quality of their environment, and it’s crucial to provide the right conditions for them to thrive.

Notable factors impacting axolotl growth rate:

  • Genetics: Just like any other living beings, genetics play a significant role in determining an axolotl’s ultimate size. Some individuals might grow larger, while others may remain smaller, depending on their inherited traits.
  • Nutrition: Providing a proper, high-quality diet is essential for optimal growth. Nutritious meals, such as worms, small fish or insects, promote faster and healthier growth. Be cautious not to overfeed them, as obesity can cause health issues.
  • Environment: A stable and clean environment helps axolotls develop properly. Maintain the appropriate water temperature of around 60-68℉ (15-20℃), good water quality, and regular habitat cleaning.

Typically, axolotl growth rate varies according to the mentioned factors, but they grow at a steady pace. They can grow around 8 inches within the first year.

However, their growth does not stop there, as they continue to grow slowly throughout their lives. Providing the best conditions for your axolotl will make sure they not only grow at a healthy rate but also lead a happy and comfortable life.

The Size of Axolotls at Different Life Stages

Axolotls go through several life stages, each with a specific size range, as they develop into fully grown adults. By knowing the size of axolotls at different life stages, you can better understand their growth progress and ensure you are meeting their needs accordingly.

Size of axolotls at various life stages:

  • Baby axolotls: After hatching, they start their lives at around half an inch long. At this stage, they rely on their yolk sac for nutrients and will soon begin feeding on tiny food items, like brine shrimp or daphnia.
  • Two-month-old axolotls: Within two months, axolotls grow to approximately 3 inches in size. At this stage, they are usually large enough to consume larger foods, such as small worms or juvenile insects.
  • Six-month-old axolotls: By six months, axolotls have typically reached around 6 inches in length. Their dietary requirements remain similar, with a focus on worms or insects as food sources.
  • Adult axolotls: After a full year, axolotls can range in size from 9 to 12 inches. Despite being considered adults, they continue to grow slowly throughout their lives, although at a diminishing rate.

Axolotls usually take about a year to reach their full size, but this can depend on factors like genetics, nutrition, and environmental conditions. It’s crucial to provide axolotls with suitable care during each stage to ensure their healthy growth and overall well-being.


Axolotl growth rates can differ depending on genetics, nutrition, and habitat conditions. Providing a proper environment, quality diet, and appropriate care is essential to ensure a steady and healthy growth pace. 

Monitoring their size through different life stages, from baby axolotls to adults, helps you meet their needs and gives you a better understanding of their development. By nurturing your axolotl with dedication and attention, you will not only contribute to their healthy growth but also foster a positive bond with these fascinating creatures.