Buy RS3 2/3 green blubber jellyfish
The 2/3 green blubber jellyfish is a piece of food in RuneScape 3. It is a green blubber jellyfish that has been eaten once, so two bites are left. Each bite heals up to 500 life points, which means this item can heal up to 1000 life points in total. You need at least level 20 Constitution to get the full healing from each bite.
This jellyfish works a lot like a potion. Eating it does not lower your adrenaline, and you can eat it alongside other food and potions. That makes it a strong pick for combat, since you can heal fast without losing your adrenaline bar.
Green blubber jellyfish come from the Deep Sea Fishing Hub, which players reach by talking to Goomah in the Fishing Guild. Catching them takes level 68 Fishing, and cooking them takes level 72 Cooking.
Partially eaten jellyfish like this one can be combined into full jellyfish. This is done with the clan representative at War's Retreat, Granny Rowan at Fort Forinthry, or Jellyfish Mender Judd at the Deep Sea Fishing Hub. This is a members-only item.