The Fisch Wiki Bestiary lists 37 Secret fish and 11 Divine Secret fish in its update marked September 25, 2026. There is no single method for catching them: the verified examples below range from fishing anywhere to waiting for a specific hunt or migration event. The Bestiary is an unofficial, fan-maintained reference, and the available fish-specific information does not establish current setup instructions for every entry, so check each fish’s in-game details before you grind.
How many Secret fish are in Fisch?
The Fisch Wiki Bestiary lists 37 Secret fish and 11 Divine Secret fish, for 48 across those two rarity categories. That is the count on the Bestiary page marked updated September 25, 2026; it is not an official developer-published count. The page also has a broader fish table with locations, bait, preferences, and descriptions where available.
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This guide gives specific methods only for the five fish whose reviewed entries establish useful catch details. It does not claim those are all the Secret fish, or that every listed fish has the same rarity odds or requirements. For any fish not covered below, use its individual Bestiary entry and confirm details in game, since updates can change requirements.
Verified Secret and Divine Secret fish methods
Odds below are figures stated by the Fisch Wiki fish pages, not guaranteed outcomes. Keep the trigger condition attached to each figure: an event’s chance to occur is not necessarily the same as a chance to catch a particular fish.
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| Fish | Rarity established by reviewed entry | Where and when | Bait or setup | Odds and special mechanics |
|---|---|---|---|---|
| Resin | Not specified in the reviewed entry summary. | Mushgrove Swamp. | No preferred bait is stated. The page recommends Weird Algae for universal luck. | The 2026 Fisch Wiki entry states a base chance of 1 in 3,751 and a chance of 1 in 300 during Aurora Borealis. It says three Resin are needed to craft Water Bubble with the Bubble Mermaid NPC. Treat these as community-wiki figures that may change. |
| Him | Divine Secret. | Any location. | No preferred bait is stated. | The 2026 Fisch Wiki entry gives a fixed chance of 1 in 1,000,000 and says it cannot be affected. Do not assume other Divine Secret fish share this mechanic. |
| Boulder | Not specified in the reviewed entry summary. | Keeper’s Altar. | No preferred bait is stated. | The 2026 Fisch Wiki entry states a base chance of 1 in 1,000,000, but also describes a Crew Rod Mastery exception and event-specific chances. The base figure should not be treated as applying under every condition. |
| Witherbloom | Not specified in the reviewed entry summary. | It is in Toxic Grove’s hunt pool during a Witherbloom hunt. The entry says the hunt ends after 20 seconds if nobody is near the pool. | During a Rotbloom hunt, use a Blight Idol to spawn it. Witherbloom can be caught only while visible in the pool; interacting with Toxic Shrooms can make it visible. | The hunt has a toxic surface hazard. No catch odds are stated in the reviewed entry summary. |
| Moby | Not specified in the reviewed entry summary. | The Ocean during Whale Migration. | The entry describes a migration-event context and a replacement mechanic associated with catching a Blue Whale. It does not establish bait, time, weather, or season preferences in the reviewed summary. | The 2026 Fisch Wiki entry describes a 20% chance of spawning and a fixed replacement chance when a Blue Whale is caught. These are separate parts of the event context; the available information does not support combining them into a single chance to catch Moby. The replacement chance is not specified here. |
How to check requirements for the other fish
Because there is no shared catch method, check the individual Bestiary entry before choosing a location or spending time on a grind. In particular, look for:
- Location or pool: confirm the named area, and whether the fish belongs to a special event or hunt pool.
- Event or hunt trigger: note whether you must wait for an event, use an item to start or change it, or meet another condition first.
- Bait and preferences: check any bait, time, weather, or season details the entry actually provides; do not infer a preference from a different Secret fish.
- Visibility and hazards: find out whether the fish must become visible in a pool or whether approaching it involves a hazard.
- Odds and boosts: distinguish a stated base chance from an event chance, a replacement mechanic, or a chance explicitly described as fixed. Do not assume luck boosts work unless the entry says so.
The Fisch Wiki is an unofficial fan-maintained source, not official developer documentation. Its entries are useful for locating requirements, but in-game details after an update should take precedence if they differ.
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Do Secret fish count toward Bestiary completion?
According to the Fisch Wiki Bestiary page, Secret, Divine Secret, and Limited fish are not required for Bestiary completion. The same page says receiving a fish through trading does not increase your Bestiary completion percentage. It notes Phantom Megalodon as an exception to its general statement about tradeability, so do not assume every fish follows the same trading rule.
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