Kolto

Kolto was the precursor to the medical fluid bacta, which was applied in the same way. Kolto was a highly effective healing agent, and was therefore highly sought after. It was found on the planet Manaan, where the native Selkath mediated and sold it to both the Galactic Republic and to the Sith, not wanting to cause conflict. Kolto was found at the bottom of the great ocean which completely covers Manaan. It was found within great chasms, and, in at least one instance, was guarded by a giant mutant fish. It is possible that this fish was enormous because it fed off Kolto, but the actual reason is unknown.

Appearances
Star Wars: Knights of the Old Republic