🐾 Jellyfish Pet in Grow a Garden — Legendary
Jellyfish is a Legendary pet from the third part of the High Tide Harvest Event, found in the Mythical Chest of Chest Conquest. Its sting is a coin flip weighted against you: a hit is very good, and a miss takes something away.
Last verified against the Jellyfish page and the ability data on the Grow a Garden wiki.
Chest Conquest, Mythical Chest.
📋 Jellyfish at a glance
| Rarity | Legendary |
|---|---|
| How to get | Mythical Chest from Chest Conquest (High Tide Harvest Event) |
| Hunger | 15,000 |
| Ability (wiki wording) | Jelly Sting: Occasionally stings a fruit or pet. Fruits have a chance to gain Static, Tidal and Shocked, otherwise lose 1 random mutation. Pets have a chance to gain XP and advance their cooldown, otherwise lose 1 level. |
| Added | July 18, 2026 (High Tide Harvest Event, part 3) |
| Still obtainable? | No, per the wiki |
⚡ What Jelly Sting does
Every 14 minutes at base weight, the Jellyfish stings either a fruit or a pet, with a 25% chance of success.
- Fruit, success: it gains Static (×8), Tidal (×5) and Shocked (×100), all three at once. Failure: it loses 1 random mutation.
- Pet, success: it gains 1,000 XP and its cooldown jumps forward 2 minutes 10 seconds. Failure: it loses 1 level.
At base weight three stings in four fail. One success on a fruit adds 110 to its mutation total, though, so a single hit can outweigh many lost mutations, but only on fruit you weren't counting on.
📈 Jellyfish stats by weight
| Pet weight | Cooldown | Success chance | XP on success | Cooldown advanced on success |
|---|---|---|---|---|
| 10 kg | 12:36 | 27% | 1,100 | 2:23 |
| 25 kg | 10:30 | 30% | 1,250 | 2:42 |
| 50 kg | 7:00 | 35% | 1,500 | 3:15 |
| 100 kg | 7:00 | 45% | 2,000 | 4:20 |
The success chance rises 0.2% per kilogram, to 45% at 100 kg. Its 50% cap needs about 320 kg. The XP and cooldown advance on a pet hit double by 100 kg (2,000 XP, 4 minutes 20 seconds), and the cooldown halves to 7 minutes at 50 kg.
🪼 Who should use one
The heavier the better: a 100 kg Jellyfish succeeds almost half the time. Its ability text doesn't say whether it skips favorited fruit, so harvest anything you can't afford to lose a mutation on before you put it out.
⚡ See Jellyfish's ability at your pet's weight →
❓ FAQ
What does the Jellyfish do in Grow a Garden?
Every 14:00 at base weight, it stings a fruit or a pet with a 25% to 50% chance of success. A fruit gets Static, Tidal and Shocked, or loses a mutation on a miss. A pet gets 1,000 to 2,000 XP and a cooldown advance, or loses a level on a miss.
Is the Jellyfish risky?
Yes. At base weight 75% of stings fail, costing a mutation or a level. At 100 kg the failure rate is 55%.
How do you get a Jellyfish?
It came from the Mythical Chest in Chest Conquest during the High Tide Harvest Event.