Re: Why do fish have backbones?

In message <[EMAIL PROTECTED]>, Coreleus
Corneleus <[EMAIL PROTECTED]> writes
>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?

Structural and physical. If a submarine didn't have a skeleton, it would
be a reef.
-- 
http://www.earthpoetry.demon.co.uk
RC