Seaweed

Seaweed is a members item, with a high alchemy value of 1 coins. The simplest way for an Ironman to get Seaweed is to buy it: Trader Stan's Trading Post in Karamja sells it for 2 coins, and one other shop stocks it too.

“Slightly damp seaweed.”

MembersTradeable (not for Ironmen)High alch 1 gp

Updated 9 October 2026. Sources from the RuneScape Wiki's drop, shop and recipe data (CC BY-NC-SA 3.0), checked 2026-10-09. Item sprite © Jagex.

Ironman verdict

At least 8 monsters drop it. The easiest is Giant lobster (level 40, 2/128); the best rate is Dagannoth (level 78), at 30/128, about 1.3 per kill. You can also make it yourself: it takes 16 Fishing and gives 1 Fishing XP. Other sources include Baby impling, Baby impling jar, Granite crab and Thalassus, plus 4 more listed below. Reaching level 16 Fishing takes 2,746 XP in total; the Fishing calculator counts the actions and materials to any target, and the Fishing guide has the Ironman training route. 7 recipes use Seaweed, including Fishbowl (seaweed), Great maki and Ground seaweed. Seaweed is members-only. It is tradeable on normal accounts, but an Ironman cannot use the Grand Exchange or trade for it, so the sources on this page are the whole list. High Alchemy turns one into 1 coins, which is 1 less than the shop price, so buying it to alch does not pay.

At a glance

Members: Yes
Tradeable: Yes, but not for Ironmen
High alch: 1 coins
Monster drops: 8
Shops: 2
Recipes: 1
Used in: 7 recipes

Monster drops

Dropped by	Level	Quantity	Rarity
Dagannoth	78	1–10	30/128
Giant lobster (Ghosts Ahoy)	42	1	Always
Aquanite	95	6 (noted)	18/128
Waterfiend (Ghorrock)	102	6 (noted)	18/128
Icefiend (Ghorrock)	107	6 (noted)	18/128
Waterfiend	107	6 (noted)	18/128
Giant lobsterEasiest	40	5	2/128
Mogre	45	4–8 (noted)	2/128