Dive Down on Roblox features mutated fish that earn more money per second and sell for higher prices than their standard counterparts. Mutations fall into two distinct categories — Ocean and Weather — and each one applies a specific multiplier to a fish's earning rate and sale value. Understanding how they spawn and stack (or don't) is key to maximizing your aquarium income.
Quick answer: Rainbow is the strongest mutation in Dive Down with a 3.0x multiplier, but it has the lowest spawn chance. For Weather mutations, Chocolate offers the highest boost at 2.2x and requires the Chocolate Rain weather event.
Ocean Mutations in Dive Down
Ocean mutations appear on fish while you're diving. Any fish in any ocean zone can randomly spawn with one of three Ocean mutations. You'll spot them by their altered appearance and a floating label above the fish's head. These mutated fish are caught the same way as normal ones — just grab them when you see them.
| Mutation | Multiplier | Visual Cue |
|---|---|---|
| Silver | 2.4x | Entirely silver body with "Silver" text overhead |
| Gold | 2.7x | Entirely yellow body with "Gold" text overhead |
| Rainbow | 3.0x | Colors cycle through red, yellow, green, pink, and blue with "Rainbow" text overhead |
All three Ocean mutations can appear in every diving area, from the Sunlight Zone down to Atlantis. Higher-rarity fish with mutations are obviously the most valuable catches in the game, so keep an eye out for color-shifted fish at every depth. Rainbow-mutated fish are the rarest of the three, which tracks with their superior 3.0x multiplier.
Weather Mutations in Dive Down
Weather mutations work completely differently from Ocean mutations. You won't find Weather-mutated fish while diving. Instead, these mutations are applied to fish that are already sitting in your aquarium when a weather event occurs on the surface. Weather events spawn randomly and last up to 3 minutes, and during that window, random fish in your aquarium have a chance of receiving the corresponding mutation.
| Mutation | Multiplier | Triggered By | Visual Cue |
|---|---|---|---|
| Frozen | 1.5x | Snow weather | Blue appearance, encased in an ice cube; "Frozen" label in aquarium menu |
| Shocked | 1.9x | Storm weather | Pink aura around the fish; "Shocked" label in aquarium menu |
| Chocolate | 2.2x | Chocolate Rain weather | Dark brown appearance; "Chocolate" label in aquarium menu |
Weather mutation multipliers are lower than Ocean mutation multipliers across the board. Frozen at 1.5x is the weakest mutation in the entire game, while Chocolate at 2.2x sits between Silver and Gold in terms of raw value. The trade-off is that Weather mutations don't require you to hunt for rare spawns underwater — they're applied passively to fish you've already collected.
How to Trigger Weather Events
Weather events appear on their own at random intervals, so patience is one approach. If you'd rather not wait, every bridge in Dive Down has a weather machine you can interact with. The machine lets you choose which weather event to start, but activating it costs Robux. Once a weather event begins, it can run for up to 3 minutes, during which your aquarium fish have a chance to mutate.
Can Fish Have Multiple Mutations?
No. Each fish in Dive Down can hold exactly one mutation. A fish that already has an Ocean mutation (Silver, Gold, or Rainbow) cannot receive a Weather mutation on top of it. The reverse is also true — a Frozen fish won't pick up a second Weather mutation or gain an Ocean mutation later. This one-mutation-per-fish rule means you need to think carefully about which fish you want mutated and how.
Because of this limitation, the optimal strategy is to keep your highest-rarity fish unmutated in the aquarium if you're hoping for a Chocolate Rain event, since Chocolate's 2.2x multiplier on a Mythical or Secret fish is extremely valuable. Meanwhile, if you spot a Rainbow fish in the ocean, grab it immediately — that 3.0x multiplier is the best you can get, and it won't be improved by any weather event afterward.
Mutation Multiplier Rankings
When comparing all six mutations side by side, the hierarchy is straightforward. Ocean mutations dominate the top of the list, while Weather mutations fill in the lower tiers.
| Rank | Mutation | Type | Multiplier |
|---|---|---|---|
| 1 | Rainbow | Ocean | 3.0x |
| 2 | Gold | Ocean | 2.7x |
| 3 | Silver | Ocean | 2.4x |
| 4 | Chocolate | Weather | 2.2x |
| 5 | Shocked | Weather | 1.9x |
| 6 | Frozen | Weather | 1.5x |
The multiplier applies to both the fish's passive earning rate in your aquarium and its sale value if you choose to sell it. A Rainbow Mermaid or Rainbow Whale, for instance, would be among the most profitable catches possible in the game right now.
Mutations add a meaningful layer of value to Dive Down's fishing loop. Ocean mutations reward sharp eyes and quick reflexes while diving, and Weather mutations give your aquarium collection a passive income boost tied to random or Robux-triggered events. Since fish can only carry one mutation, every mutated catch is a permanent commitment — so prioritize Rainbow spawns when you see them and save your best unmutated fish for the highest-value weather events.