Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!ncar!tank!uxc!uxc.cso.uiuc.edu!a.cs.uiuc.edu!m.cs.uiuc.edu!carey
From: carey@m.cs.uiuc.edu
Newsgroups: sci.bio
Subject: Re: Fat Swimmers
Message-ID: <20800004@m.cs.uiuc.edu>
Date: 6 Oct 88 18:59:00 GMT
References: <78300004@p.cs.uiuc.edu>
Lines: 6
Nf-ID: #R:p.cs.uiuc.edu:78300004:m.cs.uiuc.edu:20800004:000:167
Nf-From: m.cs.uiuc.edu!carey    Oct  6 13:59:00 1988


More fat = more buoyancy.  More buoyancy less body in the water, less
drag.

It might also be a response to being in cold water all the time,
but that is speculation.