Meet Karston, a Texas Blind Salamander that lives in the Edwards Aquifer—and the focus of the Edwards Aquifer Conservancy fiesta medal design. Karston is an endangered species that helps people, especially children, learn about the aquifer and the threatened species within it. This clever and educational fiesta medal features Karston kicking a soccer ball around. You can purchase this medal with a $5 donation here. Donate while supplies last.