You likely don't have wild axolotls nearby so if a pet escapes it'll just die and not affect the ecosystem. OTOH, an escaped salamander might thrive and displ

You likely don't have wild axolotls nearby so if a pet escapes it'll just die and not affect the ecosystem. OTOH, an escaped salamander might thrive and displace wild salamanders and disrupt the ecosystem. Or carry a disease, or ...