The species of mudskipper moves across water in a way that has never been seen before.
, was observed for a month in its natural habitats in the Mangkang region, of Central Java, Indonesia. Researchers had previously noticed the species for its ability to climb trees—one of the few fish known to do this—and were trying to learn how it does this.
"We had understood a fair amount about how they stick to the trees and rock faces, but we wanted to know more about how the body parts worked together to enable tree climbing," Parvez Alam, from the U.K.'s University of Edinburgh, toldAlam and colleagues filmed the mudskippers between 10 a.m. and 2 p.m. local time every day. They gently encouraged mudskippers on land to move using a tree branch. With slow motion footage, they were able to track its movements in detail.
"This species of fish is an odd one as it likes to spend more time out of water than in it according to our observations," Alam said."We expected tree climbing, as we had known about this for a few years... We didn't expect it to start hopping across the surface of the water. This was especially bizarre as we'd often see it jump off a vertical incline—like a mangrove root—hop across the water to get away from us, only to then hop off the water back onto a vertical incline.
"We also want to better understand the kinematics of climbing, which was the original reason we were there," Alam said, adding that as an engineer, he hopes to mimic the characteristics observed in these mudskippers in robots. Representative image of a mudskipper on a mud flat. Researchers have found a species that can hop along water in a way never reported before.
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