Durable Jellyfish are monsters found in the canal puzzle in Raids. They can also be summoned by Yakamaru. When near other jellyfish, they will rapidly heal them for up to 5% of their maximum life points per heal. They can also heal Yakamaru for 5000 life points per heal and if all images of Yakamaru are defeated, Yakamaru is able to consume the jellyfish to heal all of his life points, resetting the fight. This is required to unlock the Rewind feat.