A small island of black lavarock bluffs rising from the western Agreben Sea, within the Greenwater Isles. The volcanic rock gives the island its stark silhouette—dark cliffs meeting teal water—and lends its only settlement, the city-state of Blackport, its name.
Crab Island sits astride a convenient southern route for traders out of Mueras, making it a natural waypoint whether or not those traders are entirely law-abiding. The island's single harbor, sheltered by the bluffs, handles both merchant traffic and the Nyolci pirates who call the port home under the tacit tolerance of Blackport's retired pirate king, Bridger Blindeyes.