East Paldean Sea, North Paldean Sea, South Paldean Sea, West Paldean Sea — 4 locations on the interactive map.
Cinnabar Island, Route 11, Route 17, Route 18, Route 6, Sea Route 19, Sea Route 20, Sea Route 21, Seafoam Islands, Vermilion City — 10 locations on the interactive map.
Cinnabar Island, New Bark Town, Olivine City, Pallet Town, Route 26, Route 27, Sea Route 20, Sea Route 21, Sea Route 41, Vermilion City — 10 locations on the interactive map.
Shellder → Cloyster (Water Stone)