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I'm curious, how well do otters see at night? Do they have night vision so they can prowl in the dark?
And which otters are the most active at night?
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I'm not sure, but I remember reading somewhere that they don't really use their eyes underwater, instead relying on their whiskers for sense. Which would suggest poorer eyesight in dark conditions, if true.
Also, I suspect that it is Eurasian otters that are most active at night, but that is only a suspicion.
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