Seaweed

''This article is about the seaweed used in glassblowing. For the edible version of seaweed, please see Edible seaweed.''Seaweed is an ingredient needed to make molten glass, which is needed to blow glass. It must be first cooked into soda ash by using the seaweed on a range or fire. This does not give the player any experience whatsoever in Crafting or Cooking.

Dropping Monsters

 * Dagannoth
 * Rock Crab
 * Mogre
 * Rock Lobster

Spawns

 * Karamja (more specifically the Brimhaven area): Western and eastern shorelines, southern shore of top inlet; Both banks of the river that flows through Shilo Village.
 * Entrana: Near the Dangerous Cave; 2 spawns are unreachable.
 * Fremennik Province: North-eastern area, near the Keldagrim entrance. This area also contains a fire, making it quick and easy to turn seaweed into soda ash.
 * Piscatoris Fishing Colony: North-eastern corner.

Purchasing
Players can buy cheap seaweed from Arhein in Catherby, on the south dock near the general store icon on the map. One must talk to him and select the prompt: "Can I buy some seaweed?". He will only sell 80 seaweed a day. The seaweed is only two gold pieces each.

Players may also purchase seaweed from other players.

Fishing
Occasionally a player may catch seaweed instead of a fish while big net fishing. This method requires at least 16 Fishing to fish mackerel.