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Gastric Eversion (vomiting) In Sharks 

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  #1  
Old 05-16-2013, 04:41 PM
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Gastric Eversion (vomiting) In Sharks

Below is a video (with commentary) showing a Shortfin Mako shark displaying gastric or stomach eversion - a little similar to vomiting.

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Voluntary gastric eversion followed by retraction not only occurs, but is extremely rapid (lasting [similar]0.3 s). Eversion may occur by stomach relaxation–oesophageal contraction coupled with increased abdominal pressures to enable prolapse, and retraction by a mechanism similar to suction feeding. This behaviour provides a ‘cleansing’ function for removing indigestible food particles, bones, parasites or mucus from the stomach lining. Sharks, and possibly other animals with similar gut structures, may use this technique to help maintain a healthy alimentary tract.
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Shortfin Mako, Isurus oxyrinchus, with its stomach manually everted out of its mouth. The stomach was everted by pulling on it anteriorly and pushing it from within the coelomic cavity.

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File Type: mp4 ShortfinMakoSharkGE.mp4(7.45 MB, 1983 views)
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Old 05-17-2013, 02:29 PM
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Re: Gastric Eversion (vomiting) In Sharks

Never heard of this before or seen it

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Old 05-18-2013, 07:31 AM
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Re: Gastric Eversion (vomiting) In Sharks

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Originally Posted by Kelly View Post
Never heard of this before or seen it
Nor me, it's fascinating!! I ended up watching loads of videos of sharks puking up. They were all pretty much the same and this was the most impressive.

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Old 05-19-2013, 11:33 AM
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Re: Gastric Eversion (vomiting) In Sharks

first time seeing or hearing bout that.
cool.

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Old 06-02-2013, 06:50 PM
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Re: Gastric Eversion (vomiting) In Sharks

I had no idea sharks did that! Fascinating.

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