Re: Why do fish have backbones?

Coreleus Corneleus wrote:
> Skeletons are generally needed for structural support for land
> organisms in order for their bodies to overcome gravity and aid in
> locomotion.
>
> What are the underlying structural and physical reasons for the
> evolution of the endoskeleton in vertebrate fish, however?

  None. It's biochemical; specifically, a calcium reservoir.

  Mark L. Fergerson