Shallower living moray eels like this one seen at a depth of 279 meters, are nocturnal and/or live in holes and crevices to avoid predators.
Moray Eel
Image courtesy of the NOAA Office of Ocean Exploration and Research, 2016 Deepwater Exploration of the Marianas. Download larger version (jpg, 1.4 MB).

Shallower living moray eels like this one seen at a depth of 279 meters, are nocturnal and/or live in holes and crevices to avoid predators.

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