Danionella cerebrum. So transparent that even the second eye is visible through the head. (IMAGE)

Charité - Universitätsmedizin Berlin

Danionella cerebrum. So transparent that even the second eye is visible through the head.

Caption

The fish moves away in response to a sound played underwater, showing that it can tell which direction the sound comes from. Illustration © Antonia Groneberg, Charité and Jonathan Anand

Credit

© Antonia Groneberg, Charité and Jonathan Anand

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