. . . "Rock Ussals were the most often seen species of Ussal Crabs on Voya Nui. Many of them appeared in the Voya Nui Online Game, in which they were more aggressive than average Ussal. They may have not survived the return of Voya Nui to the Southern Continent"@en . "Rock Ussals were the most often seen species of Ussal Crabs on Voya Nui. Many of them appeared in the Voya Nui Online Game, in which they were more aggressive than average Ussal. They may have not survived the return of Voya Nui to the Southern Continent"@en . "Rock Ussal"@en . .