Sharks season ticket sales for 2017-18 are about the same as they were the year before when the team was coming off a trip to the Stanley Cup Final, the club’s chief operating officer said. John Tortora, COO of Sharks Sports & Entertainment, said Sunday that roughly 12,000 season tickets or their equivalents have been sold for this year, as new sales were added and about 90 percent of existing ticket holders renewed for this season. The Sharks’ average announced attendance for 41 regular season games in 2016-17 was 17,508, or 99.7 percent of capacity. “There’s still some work to do, obviously,” Tortora said at SAP Center, where the team was holding its FanFest. “But it’s very consistent. Our fans are very loyal.” Tortora said about 2,500 more season tickets were sold in 2016 after the Sharks made the Cup final for the first time as a franchise. Of those 2,500, about 70 percent of those new ticket holders renewed for this season. The average for NHL and NBA teams in the same circumstance as the Sharks is 50 percent renewal, Tortora said. “That was a strong test for us, because you run the risk after a Stanley Cup final run of getting new season ticket holders and not being able to keep them,” Tortora said. “Thus far we’re doing quite well.” The Sharks lost in the first round of the playoffs to Edmonton in April and saw one of their most recognizable players in Patrick Marleau leave in free agency.