Fathom pearl

Fathom pearl
Icon
Released							19 November 2025 (Update)
Hotspot							Facility
Options							Quick-locate, Locate-shoal, Deactivate
Examine							A magical stone that can be used to precisely locate shoals of fish while out at sea.
Advanced data
Object ID							59768
Icon Item ID							32229

The fathom pearl is a boat facility used to locate shoals whilst deep sea trawling. It can be built at specific facility hotspots on the boat, requiring level 91 Sailing and 83 Construction, granting 2,307 Construction experience.

The "Locate-shoal" option will open a menu prompting the player to choose a desired shoal to locate. Choosing a shoal will inform the player which cardinal direction the shoal is found, as well as display an arrow marker () on the minimap; if a chosen shoal is not nearby, it will inform the player that there are no shoals of that type within range of the fathom pearl. This option will interrupt player actions, as doing so requires them to be in front of it.

Meanwhile, the "Quick-locate" option will do the same to the last shoal chosen in the menu, or the closest shoal within range if they did not do so. This option will not interrupt player actions, nor require the player to be next to it.

While temporary boosts can be used to build the facility, players must maintain the Sailing boost whenever they wish to make use of it.

v t e Deep sea trawling
Facilities	Trawling nets Rope trawling net Linen trawling net Hemp trawling net Cotton trawling net Other Chum station Advanced chum station Chum spreader Fathom stone Fathom pearl
Shoals	Giant krill shoal Haddock shoal Yellowfin shoal Halibut shoal Bluefin shoal Marlin shoal Shimmering shoal Glistening shoal Vibrant shoal
Fish	Raw Giant krill Haddock Yellowfin Halibut Bluefin Marlin Cooked Giant krill Haddock Yellowfin Halibut Bluefin Marlin Burnt Giant krill Haddock Yellowfin Halibut Bluefin Marlin Trophy Giant blue krill (stuffed • mounted) Golden haddock (stuffed • mounted) Orangefin (stuffed • mounted) Huge halibut (stuffed • mounted) Purplefin (stuffed • mounted) Swift marlin (stuffed • mounted) Other Fish offcuts Fine fish offcuts Haddock eye Yellow fin Marlin scales
Crates	Camphor Empty Giant krill Haddock Yellowfin Halibut Bluefin Marlin

v t e Shipbuilding
Boats	Raft Skiff Sloop
Core boat parts	Hulls Wooden Oak Teak Mahogany Camphor Ironwood Rosewood Helms Bronze Iron Steel Mithril Adamant Rune Dragon Mast and sails Wooden Oak Teak Mahogany Camphor Ironwood Rosewood Keels Bronze Iron Steel Mithril Adamant Rune Dragon Other Flags Storm chaser Swamp cruiser Crystal glider Trims No trim Shark Inky Barracuda Salvor Guthix Saradomin Zamorak Armadyl Merchant Angler Sandy Eternal brazier Sail patterns Plain Black Blue Green Pink Purple Red Yellow
Facilities	Cargo holds Basic Oak Teak Mahogany Camphor Ironwood Rosewood Cannons Bronze Iron Steel Mithril Adamant Rune Dragon Salvaging hooks Bronze Iron Steel Mithril Adamant Rune Dragon Trawling net Rope trawling net Linen trawling net Hemp trawling net Cotton trawling net Other Range Keg Anchor Innoculation Station Salvaging Station Wind catcher Teleport focus Chum station Advanced chum station Fathom stone Crystal extractor Greater teleport focus Gale catcher Chum spreader Fathom pearl Ballistic attractor Bosun's workbench
Shipwrights	Junior Jim Sam Sally Sophie Steve Sarah Sennia Silas Seth Spencer Sigrun Soraya Scott Sylvia Sornik Silrien
Port wizards	Perrie Peter Petra
Items	Boat bottle Facility bottle Keel parts Bronze Iron Steel Mithril Adamant Rune Dragon Large keel parts Bronze Iron Steel Mithril Adamant Rune Dragon Hull parts Wooden Oak Teak Mahogany Camphor Ironwood Rosewood Large hull parts Wooden Oak Teak Mahogany Camphor Ironwood Rosewood Paint Angler's Armadylean Barracuda Guthixian Inky Merchant's Salvor's Sandy Saradominist Shark Zamorakian