Tetra Animal Pictures

Paracheirodon Axelrodi

© Aka / Creative Commons / Original

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© Lerdsuwa / Creative Commons (Original)
© Aka / Creative Commons (Original)

Rcfernandes - Public Domain

© Rcfernandes - Public Domain
© Debivort / Creative Commons (Original)

Animals that are blind – Mexican Tetra
© Kuttelvaserova Stuchelova/Shutterstock.com

The Mexican Tetra is born with eyes that it eventually loses.