Firefly
Overview
The Firefly has a glowing transparent abdomen that emits faint light. It appears as a small, brown bug, with similar structure to that of a bee.
Approximately every 80 seconds, it has a 3% chance to apply the 'Shocked' mutation to a nearby crop.
Firefly
Info

Tier | Mythical |
Obtainable | No |
Obtain the Pet | Joining a Grow A Garden Test Server |
Hatch Probability | Unknown |
Hunger | Unknown |
How to Get Firefly in Grow a Garden
Join a Grow A Garden Test Server to get this pet, though it's currently test-exclusive.
Trait of Firefly
Every ~80 seconds, there's a 3% chance the Firefly will shock a nearby crop.
More Details About Firefly
Getting the Firefly is tricky since it's only available in test servers. There's talk it might be discontinued and not make it to the main game, but that's not confirmed.