One species of gray whale occurs in California's waters. A future review may result in the gray whale hunt being resumed. This census is the longest running census of the Pacific gray whale. A recent study provides some evidence that solar activity is correlated to gray whale strandings. Eschrichtiidae only has one living member&colon; the gray whale. NOAA has collected surveys of gray whale population since at least the 1960s. Perhaps the extreme example of North Pacific whale migration is that of Gray whale. Other whales, such as the gray whale, only use one side of their baleen. Species listed below also includes species being recorded in Levantine Sea except for gray whale. JJ, another gray whale calf, was kept at SeaWorld San Diego. Eschrichtiidae consists of only one living member&colon; the gray whale ("Eschrichtius robustus"). The waters off Sequalitchew Beach are inhabited by harbor seal, marbled murrelet and gray whale. By 1934, the western gray whale was near extinction. They especally hunted gray whale for its size and weight. As of 2001, the Californian gray whale population had grown to about 26,000.