Hawaii, Washington, and Oregon have already outlawed the sale of shark fins, a market that is supplied by shark finning, wherein sharks are caught, their fins and tails are sliced off and they are dumped back into the water to sink and die. Up to 73 million sharks are killed through finning every year, pushing some shark populations to decline by as much as 90 percent in recent years. Lobbyists for both fin importers and the restaurant industry pressed Gov. Brown to veto the bill, as finning represents a substantial industry. About 85 percent of U.S. shark fin consumption has historically occurred in California , making this landmark conservation legislation.