OK, I didn't think fish had eyelids and, while I expect that is generally correct, that doesn't mean that they don't blink. I thought I saw them do something that looked like blinking but I could never see them do it while so still.
Here is a row of Brochis waiting for bedtime (1/2 after normal lights out), watch for 1 and 3 to do their blinking.
Yes, cories and brochis will "blink". Thanks for sharing the video.
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As jeaninel said, all the coryadidae will do this. It is not blinking, since you are right, fish do not have eyelids [with a couple exceptions, which I think I mention in my article on light]. They achieve the "effect" by being able to rotate the eyes. To us is looks like a blink.:-)
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