Fish mutation
Hole Mutation
Hole is a fish mutation in Roblox +1 Drain Water Per Click that multiplies a fish's sell value and aquarium earnings by ×20. Rare natural spawn; spawn chance boosted by roughly +10% during Black Hole weather (about 4 minutes; one source reports it fires about twice an hour)
Data verified:
Multiplier
×20
See what Hole does to any fish: enter a base value in the Mutation Calculator and compare all four mutations at once.
Open Mutation CalculatorAll mutations compared
How much is a Hole fish worth?
A Hole mutation multiplies the fish's base value ×20 — both its sell price and its aquarium earnings. Example: a 1,000-Value fish becomes 20000 with Hole.
How do I get Hole fish?
Rare natural spawn; spawn chance boosted by roughly +10% during Black Hole weather (about 4 minutes; one source reports it fires about twice an hour) Mutations only apply at spawn — you can't add one to a fish you already caught.
Can Hole stack with other mutations?
No. Every source agrees a fish carries at most one mutation.
Sources
- allthings.how — +1 Drain Water Per Click mutationsthird-partyhttps://allthings.how/1-drain-water-per-click-mutations/(accessed August 28, 2026)Mutation multipliers, weather windows (+10% spawn, ~4 minutes).
- TechWiser — Mutations in +1 Drain Water Per Clickthird-partyhttps://techwiser.com/mutations-1-drain-water-per-click/(accessed August 28, 2026)Gold ×2, Diamond ×5, Venom ×10, Hole ×20 (player-measured).
- Nerd's Chalk — best fish mutations in +1 Drain Water Per Clickthird-partyhttps://nerdschalk.com/best-fish-mutations-drain-water-per-click/(accessed August 28, 2026)Confirms mutation multipliers and weather effects; caveats values are player measurements.
Values on this page are only as reliable as their sources. See our methodology for how data is collected and verified.