Do fish blink?

dofishblinkD: Do fishes blink?

Me: No, I don’t think so. We blink to keep our eyeballs moist.

D: What’s ‘moist’?

Me: Not dry – we blink to stop out eyeballs drying out, and fish live in water, so they don’t need to stop their eyeballs drying out.

D: But water can STING if you get it in your eyes, and THEN you have to blink.

Me: Water doesn’t sting – it’s a bit nothingy on its own. The fish are used to having it in their eyes.

D: What about the BABY fish? They won’t be used to having it in their eyes. Do they just come out, blink a few times and then they’re used to it?

Me: No. I don’t think they’re built with eyelids. They just have their eyes wide open all the time because they don’t need to blink.

D: Oh.

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