Baskarn
this inhospitable jungle world was located in the Outer Rim. Baskarn was the homeworld of the Yrashu race, and was also the site of Advanced Base Baskarn, which the Alliance used as a point to make guerilla runs into Imperial territoriy. The Alliance forces who worked on Baskarn discovered that an airborne, symbiotic bacteria which was breathed in as part of normal respiration gave them the ability to breathe underwater for short periods of time. The bacteria were specific to Baskarn, and died out whenever a being let the planet. The ability to breathe water also faded.