Chitin Plate and Hardened Chitin are crafting materials tied to the Deep update in Fisch, and both feed into the newer rods and equipment you build later on. Chitin Plate drops often, while Hardened Chitin is much rarer, so the fastest route is a single spot where both come from the same target.
Quick answer: Travel to the Gloomy Crevice in The Deep, equip the Harpoon Gun, and hunt the orange-highlighted Yeti Crab. Each catch has a high chance to drop Chitin Plate and a lower chance to drop Hardened Chitin, with no weather or time requirement.
Where to farm: Gloomy Crevice in The Deep
The Gloomy Crevice sits in the deepest part of The Deep. It is easy to recognize because the floor glows bright green, so once you swim down into that dark, green-lit trench you are in the right place. This is where the Yeti Crab spawns, and it has the best drop chance for both materials.
The Yeti Crab is a legendary-rarity fish that swims in the open water of the crevice rather than sitting on the seabed. Because it spawns regardless of time of day or weather, you can farm here whenever you reach the location.
Farm Yeti Crabs with the Harpoon Gun
You know it worked when the catch banner confirms the crab and its bonus items. A typical result reads “You just caught a Yeti Crab,” followed by “Extra Find! You just caught a Chitin Plate!” and, on the rarer rolls, “Rare Find! You just caught a Hardened Chitin!”
Drop rates for each material
| Material | Drop chance from Yeti Crab | Notes |
|---|---|---|
| Chitin Plate | High and consistent | Comes as an “Extra Find” on most catches |
| Hardened Chitin | Low and occasional | Appears as a “Rare Find,” so expect it less often |
Because the two share the same source, every crab you catch pushes you toward both totals at once. The gating factor is Hardened Chitin, so keep looping even after your Chitin Plate stockpile looks healthy.
Extra drops from the Bounty Tracker
Beyond crab hunting, the Bounty Tracker in the Deep’s white domed city hands out contracts that reward materials on turn-in. Speak to the NPC at the wooden bounty board and choose “What’s on the board?” to see the current list.
Contracts ask you to deliver a specific fish from a set area, such as a Mantis Shrimp from the Outer Deep, within a 10-minute window. Completing them pays out C$ alongside materials. A cleared batch can return several Chitin Plate and a few Hardened Chitin in one turn-in, which stacks on top of what you gather from crabs.
What Chitin Plate and Hardened Chitin are used for
Both materials are crafting resources for the rods and equipment added in the Deep update. Certain NPCs also request them for quests; for example, the Bearing Reinforcement task that asks for 30 Chitin Plate and the Supplying the Garrison task that asks for 20 Chitin Plate. Since several uses draw from the same pool, it is worth farming a surplus rather than the exact amount a single recipe needs.
