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 2 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.