Ivar's is a seafood restaurant chain based in Seattle, Washington, United States, with operations in the Puget Sound region and in Spokane, Washington. Ivar's also owns the Seattle-based burger restaurant chain Kidd Valley. History Ivar's was founded in 1938 by Seattle folk singer Ivar Haglund. Having built Seattle's first aquarium on what is now Pier 54, he decided to add a companion fish and chips bar to feed his visitors. The bar was short-lived, however. On July 22, 1946, Haglund opened a new restaurant, Ivar's Acres of Clams, at the same location. The aquarium closed ten years later, but the restaurant remains. Ivar's has two other full-service restaurants: Ivar's Salmon House in Seattle's Northlake neighborhood, and Ivar's Mukilteo Landing in Mukilteo, Washington, next to the Washington State Ferries terminal. There is a fishbar outside of all three full-service restaurants. All its other locations are seafood bars. Ivar's created the famous saying of "keep clam" that is posted all over each of the eateries. Nard Jones remarked in 1972 that Haglund was "not afraid to reflect Puget Sound tradition in the decor of his restaurants, whereas others of his profession seem intent on making their patrons forget where they are." In this respect, he singled out the Salmon House, "an almost exact replica of an old Indian longhouse." Every Independence Day from 1964 until 2008, Ivar's sponsored the Fourth of Jul-Ivar's festival and fireworks show at Downtown Seattle's Myrtle Edwards Park on Elliott Bay. Ivar's estimated its attendance at around 300,000 people. On April 3, 2009, Ivar's announced it was no longer sponsoring its Fourth of Jul-Ivar's community fireworks show. Ivar's decided to focus its efforts on feeding families in the Pacific Northwest through its partnership with Northwest Harvest. Underwater billboard hoax Capitalizing on founder Haglund's reputation for eccentric marketing stunts, Ivar's put out a story that Haglund had placed billboards on the bottom of the Sound, related to a proposal he had once made for submarine traffic as a viable mode of transportation. Some documentation was released, including maps of possible sub-aquatic billboard locations. On August 22, 2009 one of the rumored signs was discovered and hoisted out of the water, advertising a cup of Clam Chowder for $0.75. Several other signs followed. The signs were displayed publicly as authentic, with Ivar's saying that for a time they would honor the $0.75 price for chowder. All of this turned out