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rivulus

[ riv-yuh-luhs ]

noun

, plural riv·u·lus.
  1. any of several killifishes of the genus Rivulus, native to small streams of tropical America, often kept in aquariums.


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Word History and Origins

Origin of rivulus1

< New Latin, Latin: rivulet
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Example Sentences

Turko co-authored a recent study on the mangrove rivulus, a fish that leaps on land when its tropical waters get too warm.

A number of amphibious fish have the ability to catapult onto dry land, but the rivulus lives in the tropics and subtropics, where humidity is high and water and air temperatures are roughly the same.

For instance, mangrove rivulus “have specialized skin that takes on many of the roles of gills,” such as maintaining salt levels, Turko says.

But many fish, like the mangrove rivulus, have adaptations that let them breathe air.

So it makes sense for the rivulus and other amphibious fish to find cooler ground, he says.

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