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    True that sharks are the only water creature that doesn't lay eggs, thus the young are still born. Because it's warm blooded?

    Question #110522. Asked by 29CoveRoad. (Nov 06 09 12:19 AM)


    star_gazer

    		Some sharks lay eggs, this is called oviparity. In most of these species, the developing embryo is protected by an egg case with the consistency of leather. Sometimes these cases are corkscrewed into crevices for protection. The mermaid's purse, which can wash up on shore, is an empty egg case. Oviparous sharks include the horn shark, catshark, Port Jackson shark, and swellshark.

    http://en.wikipedia.org/wiki/Shark

    Nov 06 09, 1:36 AM
    sameer638

    		Not all sharks are viviparous, some lay eggs as well.

    All sharks are cold-blooded, so being warm-blooded as a reason for vivipary is not correct.

    http://www.sharkinfo.ch/SI1_00e/vivipary.html


    Nov 06 09, 3:04 AM

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