In Reply to: Midwater magic over the Redondo Barge posted by Merry on May 30, 2012 at 11:28:55:

I tried a while back to google the Tethy's salp, but kept getting distracting results as you might imagine.

Here is a tidbit that might offer a clue to the reason for the name.
(From Wikipedia)

In Greek mythology, Tethys (Ancient Greek: Τηθύς), daughter of Uranus and Gaia[1] was an archaic Titaness and aquatic sea goddess, invoked in classical Greek poetry but not venerated in cult. Tethys was both sister and wife of Oceanus.[2] She was mother of the chief rivers of the world known to the Greeks, such as the Nile, the Alpheus, the Maeander, and about three thousand daughters called the Oceanids.