Plant it to grow Fishbowl. If there's a fish here, he's hiding in the castle.
Fishbowl Seed price in Growtopia: sells for about 2/WL, buyers pay about 4/WL (median of 5 offers from community Discords, past 30 days). Live price chart and the latest buy and sell offers.
Recently sold at: WWUEY, HANSBW