d4ca328e_f_the_Mists_FOTM_guide___Dulfy__Agony_attack_description
[Fractal] Aquatic Ruins [Boss] Giant Jellyfish [Agony attack description] 
Players receive agony when the boss consumes them. This isn’t lethal as downed players can quickly rally by attacking the low health jellyfish adds nearby.
GW2 Fractal of the Mists FOTM guide - Dulfy
Agony attack description