Klytonian

Klytonians were a sentient species who communicated with one another through creating vibrations in electric fields using the leathery scales which covered their bodies. A group of Klytonians were present in the Mos Eisley Cantina when Luke Skywalker and Obi-Wan Kenobi entered looking for passage off Tatooine.

Behind the scenes
The only mention of the Klytonians is Star Wars Official Poster Monthly 16. It is unknown if the Klytonians were meant to correspond to any aliens seen on screen during A New Hope's cantina scene.