Grunion shrimp. An isopod, two species of flies, sandworms, and a beetle have been found preying on the eggs. Some shorebirds such as egrets and herons prey on grunion when the fish are on shore during spawning. Seagulls, sea lions, and larger fish such as sand sharks have also been observed feeding on grunion during a grunion run. The reduction of spawning habitat due to beach erosion, harbor construction, and pollution is believed to be the most critical problem facing the grunion species. Despite local concentrations, the grunion is not an abundant species. While the population size is not known, all
USS Grunion it on a Japanese naval historical website, asking if anyone could help. He was contacted by Yutaka Iwasaki, a Japanese naval historian, who not only authenticated it, but suggested he knew what happened to the "Grunion". Lane contacted ComSubPac, and their public affairs officer, Darrel Ames, posted the information on ComSubPac’s "Grunion" website. When the "Grunion" disappeared in 1942, her captain, Lt Cmdr Abele, left behind three sons – Bruce, Brad, and John. For nearly 65 years they had been searching for information about the loss of their father’s boat. When the Abele brothers encountered the post, they contacted Yutaka