Terrestrial animals do something that fish don't.
) in habitat tanks, with high-speed cameras set up to record as they went about their little mudskipper lives, moving between water and shore.
There are many different kinds of blinking in the animal kingdom, with variations of which membranes and how many of them close over the eye. Mudskippers blink by retracting their eye entirely down into the socket. When the eyeball is fully retracted, they are momentarily covered by a membrane called a dermal cup before the blink ends, and the eyes re-emerge.
Next was to figure out why the mudskippers were blinking. Interestingly, they found that the mudskippers rarely blinked while underwater; they only did so when they bumped into objects in the tank, such as water filters or other mudskippers. Predominantly, they blinked while crawling about in the air.Next, the researchers tested whether they were blinking because their eyes were dry.
This triggered blinking as the mudskippers cleaned their eyes of the dusty irritant. And the researchers gently touched the mudskippers' eyes with soft probes, triggering a defensive blink to avoid damage.
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