Leech

The Leech (Hirudinae Acidia) is found in Morytania in the Mort Myre Swamp, in the Haunted Woods east of Canifis, and in the Chaos Tunnels.

These creatures don't appear on the minimap and rarely drop anything when killed. Leeches do not deal a particularly large amount of damage. They can be dangerous, as they drain stats upon landing a successful hit. They generally serve as a distraction to players who are hunting other monsters like vampyre or ghasts, or who are trying to travel through areas that leeches are found.