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Sea snakes can sense objects at a distance by feeling movements in the water 5nvklj





Sea snakes can sense objects at a distance by feeling movements in the water 9tpt39

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    Sea snakes can sense objects at a distance by feeling movements in the water

    Dragon
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    Sea snakes can sense objects at a distance by feeling movements in the water Empty Sea snakes can sense objects at a distance by feeling movements in the water

    Post by Dragon Fri Mar 09, 2018 6:11 am

    The move from life on land to life in the sea has led to the evolution of a new sense for sea snakes, a University of Adelaide-led study suggests.

    The international team, led by researchers in the University's School of Biological Sciences, studied tiny and poorly understood structures on the heads of snakes called 'scale sensilla'. The research has been published in the Royal Society journal Open Biology.

    "Land snakes and many lizards have small raised structures on the scales on their heads – called scale sensilla – that they use to sense objects by direct touch," says lead author Jenna Crowe-Riddell, University of Adelaide PhD student.

    "We found that the scale sensilla of sea snakes were much more dome-shaped than the sensilla of land snakes, with the organs protruded further from the animals' scales, potentially making them more likely to be able to sense vibrations from all directions. We also found that scale sensilla on some of the fully aquatic snakes covered a much higher proportion of the scales' surface.

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    Post by Dragon Fri Mar 09, 2018 6:15 am

    Sea snakes can sense objects at a distance by feeling movements in the water 5757e99f2d58e
    Credit: Jenna Crowe-Riddell

    The head of a Beaked sea snake (Hydrophis schistosus) and a close up of a single scale on head.

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    Post by Dragon Fri Mar 09, 2018 6:16 am

    Sea snakes can sense objects at a distance by feeling movements in the water 5757e9e156ed0
    Credit: Chris Malam

    An olive sea snake (Aipysurus laevis) dives after taking a breath at the water’s surface.

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    Post by Dragon Fri Mar 09, 2018 6:28 am



    Many people don't realize that there are snakes that live in the ocean. And believe it or not, they're actually considerably more venomous than land snakes!

     
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    Post by Dragon Fri Mar 09, 2018 6:32 am

    Sea snakes, or "coral reef snakes", are venomous elapid snakes. They live in marine environments for most or all of their lives.

    All sea snakes have paddle-like tails and many have laterally compressed bodies – they look somewhat like eels. However, unlike fish, they do not have gills and must come to the surface regularly to breathe. Nevertheless, they are among the most completely aquatic of all air-breathing vertebrates. Among this group are species with some of the most potent venoms of all snakes. Some have gentle dispositions and bite only when provoked, while others are much more aggressive.

    Sea snakes have special nostrils that can close when they go underwater and open when they come up to breathe, like the blowhole of a whale (scientists call these valved nostrils). The nostrils are found high up on the head so that the entire snake can stay under the water when they come up to breathe. In its search for food, a sea snake may remain under water for a long time. To do this, sea snakes have evolved a single lung that almost is as long as the whole body.

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    Post by Dragon Fri Mar 09, 2018 6:37 am

    Sea snakes can sense objects at a distance by feeling movements in the water Banded_Sea_Snake-jonhanson
    By jon hanson on flickr.

    Blue-lipped sea krait

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    Post by Dragon Fri Mar 09, 2018 6:39 am

    Sea snakes can sense objects at a distance by feeling movements in the water 800px-Laticauda_colubrina_%28Wakatobi%29
    By Craig D

    Yellow-lipped sea krait, Laticauda colubrine.

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