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FAQs about Coldwater Sharks in Captivity Behavior

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Sharks and Rays in Aquariums
Gaining an understanding of how to keep these fishes in captive saltwater systems   

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by Robert (Bob) Fenner

Smoothhound shark question... cold water...    7/1/06 Hello WWM crew.  My question is about my twelve inch gray smoothhound shark.   He was born in captivity and been an aggressive eater the entire time I have had him.  He sometimes swims at the ends of the tank along the top sticking his nose out of water. <Not atypical anomalous captive behavior>   Recently he has begun swimming almost completely vertical in the tank sticking his head out of water, even in the center of the tank. <Bad...> Water parameters are great and he shows no signs of stress or illness.  No bulges or pink or redness. He still has a voracious appetite as well. <Burning... biochemically>   He really isn't utilizing all his swimming room as he spends most of the time treading water.  I should add this behavior has lasted well over a week. Thanks in advance, B. Thompson <... a coldwater animal in too warm a setting... Please read here: http://www.wetwebmedia.com/coolh20sharks.htm and the linked files above. Bob Fenner>

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