Bleakwater Jelly
Source: Drop. When a helsquid has devoured most of the food in any area, it can return to its polyp form and begin life anew. Aquatic type. Use this pet to destroy healing teams containing Blossoming Ancient, Sunflower and Teroclaw Hatchling.
The 
Bleakwater Jelly is a Legion aquatic battle pet that drops from the rare mob Soulthirster, a silver dragon jellyfish found in Helheim, Stormheim.
Guide awaiting review
Travel to Helheim Portal
From Valdisdall, follow the road north-east through the Runewoods and over the Field of Fallen Kings until you reach Haustvald. Go down the stairs and enter the Portal to Helheim at 73.7, 39.3 in Stormheim. You can also use the waypoint at 72, 41 in Stormheim to find the portal entrance.
Navigate Through Helheim
Once inside Helheim, follow the path to the wooden curve and go left through the fog, passing Guarm. Continue following the wooden path toward the bottom-left area of Helheim where Soulthirster is located.
Defeat Soulthirster Rare
Find and kill Soulthirster at 27.4, 63.4 in Helheim. Soulthirster is a vignette rare and counts toward the Adventurer of Stormheim achievement. The drop rate is not guaranteed, so repeated kills may be required — players have reported needing 20 or more kills to obtain the pet.
Tips
Bleakwater Jelly is an aquatic pet, making it particularly effective against elemental opponents. The Raindance and Squeeze ability combination is notably strong in pet battles.
