Two years ago we stayed in Mauntauk...pretty close to Block....we tied set the bulkhead of the Mauntauk fishing center for two days. The first day after sightseeing in town and along the lighthouse and beach we came back to Haleakula and low and behold hanging right next to her were 3 great whites, one over 8 ft, a mako, a 10 foot tiger as well as a few white marlin and swordfish. The fisherman who caught the biggest white was trolling 300 yards off the beach.
You don't know they are there......till they let you know, so not visually sighting them doesn't mean they aren't close by.