Fish Age Calculator

Convert fish years to human years based on species and size

Fish Species

Fish Age (in years)

Understanding Fish Ages

Fish lifespans vary greatly by species, from just a few years for small tropical fish to several decades for larger species like koi. Factors such as water quality, diet, and environment significantly impact their longevity.

Fish Life Stages

Juvenile: Early growth and development
Young Adult: Peak activity and coloration
Adult: Stable behavior patterns
Senior: Gradual slowing of activity
Elderly: Requires careful monitoring

Note: This calculator provides estimates based on average lifespans for each species. Individual fish may live shorter or longer lives based on genetics, water quality, diet, and care. Consult with an aquatic veterinarian for specific health guidance.