Do sharks really not get cancer, and if not why?

[James Mitchell]

natural at imap1.asu.edu wrote:
> 
> There is book entitled 'Sharks don't get cancer."  Its not too bad, but
> actually, it is due to several factors, one being they do not have
> calcium, only cartilage.  Second, they produce a compound called squalamine.
> 
> -Merlin

Do you mean squaline?  It's a precurssor for some steriods and is
isolated from a shark's liver.  To my knowledge the lack of observed
cancer in sharks has never been attributed to this.  I could be wrong
though.


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