Clinging tightly

Clingfish (Gobiesox maeandricus).  Image credit: Thomas Kleinteich Clingfish (Gobiesox maeandricus).
Image credit: Thomas Kleinteich

Live Science posted a story recently on the sticking power of clingfish. Northern clingfish, like the one shown in the image above, live in turbulent waters off the Pacific Coast of North America. In order to cling to surfaces, the animals have what are called adhesion discs on their bellies that they use to hold on tightly to various surfaces.

Biologist Adam Summers at the University of Washington has been studying how these fish cling to surfaces. His research team put a variety of sandpaper textures into a tank of water and placed either commercial suction cups or dead clingfish on the sandpaper (to remove any physiological actors leaving just the adhesion discs to study). They then measured the force needed to pull either the cups or the dead fish off the various surfaces. The dead animals clung better to all but the smooth surfaces better than suction cups. The trick, they discovered, were tiny hairs (microvilli) that induce friction and help the adhesion disc stick to rough surfaces.

Summers and colleagues are now trying to create commercial adhesive structures similar to the microvilli on clingfish. They believe this technology will be useful in the advancement of medicine, home and technology.


Live Science


More like this

A Madagascar sucker-footed bat (Myzopoda aurita). In the tropical forests of Madagascar, there lives a very peculiar kind of bat. While most bats roost by hanging upside-down from cave ceilings or tree branches, the Madagascar sucker-footed bat (Myzopoda aurita) holds itself head-up thanks to a set…
Synthetic Adhesive Mimics Sticking Powers Of Gecko And Mussel: Geckos are remarkable in their ability to scurry up vertical surfaces and even move along upside down. Their feet stick but only temporarily, coming off of surfaces again and again like a sticky note. But put those feet underwater, and…
Back to gekkotans: time to look at digits. Geckos are well known for the ability of many species to cling to vertical surfaces, and even to ceilings. In fact, this is usually the one thing about geckos that everyone knows. The powers of gecko adhesion are such that geckos can support their entire…
Geckos are nature's champion climbers. With remarkable ease, they can scamper across ceilings and up smooth vertical surfaces, and they do so at speed. A vertically running gecko can cover 15 times the length of its body in a single second. So far, scientists have focused their attention on the…