|Release date||7 November 2005 (Update)|
|A sneaky, spiny, subterranean sea-dwelling scamp.|
Spinolyps are small, Dagannoth-like creatures found in the deepest sublevel of Waterbirth Island Dungeon in the same room as the Dagannoth Kings. It is recommended to bring some form of antipoison as they are able to poison. Spinolyp's magic attack is a stronger form of Water Strike which drains 1 prayer point whenever it hits, similar to Saradomin Strike. Their ranged attack is poisonous and resembles the one used by Ranged-using Dagannoth. Each attack can hit up to 10.
Spinolyps will turn into level 34 Suspicious water on occasion, and become non-attackable. If the water is adjacent to a player it may deal a rapid inaccurate melee attack. After a while they will submerge again as Spinolyps.
Spinolyps' attack mechanics are unique in that the player's ranged defence determines the chance of the Spinolyps dealing damage for both their ranged and magic attacks . As such, it will always be beneficial to use a guthan's platebody over a karil's leathertop, for example.
Wearing a serpentine helm will prevent the player from being poisoned by the Spinolyps.