.<SNIP>
> While it's possible to predict the depth at which they might be found,
> (assuming sufficient data), thermoclines are still fascinating things.
> Particularly where marine life's concerned.  Some of the larger pelagics
> apparently ride them like a roller-coaster - making catching easier!
>
True in lakes as well.  The only place I have seen fresh water jellies is
riding the thermocline in Lake Travis.  The only place I have seen FW
anemones is below the thermocline in the same lake.   There is a nice web
page that tracks the temps down to 60 feet in the lake and it is (sometimes)
a very nice visual picture of a thermocline.  Today it is a flat line (this
time of year the temps are pretty even as far down as I care to go.)

> I like them 'cause - knowing where they are - I can swim above them and
keep
> warm and toasty! :-)
>
Yeah, toasty and warm but in  the lake, the viz is often a lot better below
than above.  There have been times when we have needed lights above but not
below.  I have seen days when the viz above was 8 feet and below was 40-50
feet.

CH
 .