pixabay and wikimedia.
It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
Dark Dolphin. en Darkened image of dolphin Aresmarinsleaumer claudia other versions Aresmarinsleaumer INeverCry Uploaded with Unidentified Delphinidae Images from
Page 2017 Free-images.com. All images are Public Domain