Chihuahua and Dachshund crossbreed, AKA chiweenie, who rose to fame under the Instagram handle tunameltsmyheart. The dog's account went on to amass more than 1.9 million followers on the platform.
He was abandoned by his original owner and was rescued by Courtney Dasher at a farmer's market in Los Angeles, CA.
He was the subject of a 2015 photography book entitled Tuna Melts My Heart: The Underdog With The Overbite.
He was adopted by Courtney Dasher, who created his Instagram account in 2012.
Both he and Doug the Pug built wildly popular Instagram accounts.