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Growlactus serves as a boss in Startopia. It can be fought by traveling to the Galactic Nexus, and reaching 25,000,000 Star Miles along with having a minimum ship rating of 12,000.

Starting a fight changes the background's weather to the Growganoth weather; succeeding will allow the player to journey to the Heart of the Galaxy, while losing will allow them to journey to the Desolated Waste. Previously, fighting Growlactus permanently renders the player's starship unusable, whether they have succeeded or failed.


Main article: Guide:Startopia


All-year-round Prizes

Approximate chance
32?format=webp&fill=cb-20220517091903 Wriggling Tentacle Bonus prize that comes with certain prizes
32?format=webp&fill=cb-20220517091903 Vile Vial - Chaos Infection 1/2 (50%), bonus prize
32?format=webp&fill=cb-20220517091903 HyperTech Starship Blast* 1/4 (25%)
32?format=webp&fill=cb-20220517091903 Star Tool Droid* 1/4 (25%)
32?format=webp&fill=cb-20220517091903 Space Thruster Boost Boots* 1/6 (~16,6%)
32?format=webp&fill=cb-20220517091903 Replicator* 1/8 (12,5%)
32?format=webp&fill=cb-20220517091903 MagTron LightCycle* 1/10 (10%)
32?format=webp&fill=cb-20220517091903 Startopian Empire - Force Shield & Phase Blaster* 1/10 (10%)
32?format=webp&fill=cb-20220517091903 EzCookOven's Robotic Tentacles* 1/100-120 (~0.8-1%)
32?format=webp&fill=cb-20220517091903 Horns of Infinity 1/100-120 (~0.8-1%)
32?format=webp&fill=cb-20220517091903 TK69's Mystical Etherboard* 1/100-120 (~0.8-1%)
32?format=webp&fill=cb-20220517091903 Rainbow Shoes Unknown
32?format=webp&fill=cb-20220517091903 Mjolnir While wearing a Legendary Map - Deciphered

Note that rewards which have been marked with an asterisk (*) always come with a bonus Wriggling Tentacle.

Event-exclusive Prizes

32?format=webp&fill=cb-20220517091903 Growtopia Fried Wings Wing Week or Wonder Week
32?format=webp&fill=cb-20220517091903 Pegasus Chest Pegasus Pursuit
32?format=webp&fill=cb-20220517091903 Radical Stage Anniversary Week
32?format=webp&fill=cb-20220517091903 Riding Rabbid UbiWeek
32?format=webp&fill=cb-20220517091903 Robot Lord Cape Wonder Week


  • The name "Growlactus" was inspired by Galactus, a fictional cosmic entity appearing in comic books published by Marvel Comics.
    • The appearance of Growlactus as described in-game, however, bears little to no resemblance to the character it is based on.