Short-finned eel is a Tier 5 food that can only be found and used while Dungeoneering. A cooked short-finned eel can be found either by picking it up from the table at the start of a dungeon, or by killing monsters in the dungeon and receiving it as a drop. It is the highest-tier food in Dungeoneering a free-player can eat. A Raw short-finned eel can be bought from the Smuggler, or caught at a short-finned eel fishing spot within the dungeon. It heals 200 to 1000 life points depending on your Constitution level when cooked, and the level at which it stops burning depends on the tier of the fire it is cooked on. They are also used as a secondary ingredient in creating level 49 Brave skinweaver pouches.
The minimum Constitution level to receive the full amount of healing from this food is 40.