A Fish That Eats on Land
But by using high-speed imaging, Krijn Michel, a PhD student in the Department of Biology at the University of Antwerp in Belgium, discovered that the mudskipper has evolved a novel feeding technique. With its mouth full of water, the mudskipper approaches its prey. Then, in one quick motion, it releases some of the water onto the prey in order to be able to suck the prey back into its mouth in a hydrodynamic motion.
The mudskipper has, in effect, made a tongue out of water. This may provide a clue as to how early land animals were also able to feed.
Image copyright Bjørn Christian Tørrissen, cc-by-sa-4.0