Treasure × Memory × Cramped Hotel Room - S1.E18

The successful examinees are taken by blimp to an island hotel. In order to pay for the rooms, they dive to collect treasure from sunken ships. Kurapika explains to Leorio that everyone from his clan was killed by the Phantom Troupe for their eyes. When a member of the Kurta clan dies with their emotions ablaze, their Eyes become Scarlet and are treated as treasures.