Ghostfish

Ghostfish is a fish that can be caught in The Mines on floor 20 and floor 60 during any season. It is also dropped by Ghosts with an 8% chance, making it one of the few fish that can be obtained without fishing. A Ghostfish may also appear randomly at the Traveling Cart.

Ghostfish is mainly useful for collection and for specialized crafting and fish pond production. It can be placed in a Fish Pond, where it reproduces every 2 days. The pond starts with a capacity of 1, and can be expanded to 10 by completing four quests. The pond’s primary output is white Ghostfish Roe, but other items can appear as the population rises, including Quartz, White Algae, Refined Quartz, and Pale Broth at higher populations.

When raising a Ghostfish pond, the required quest items are:

• 5 Quartz to expand from 1 to 3
• 5 Cave Carrots to expand from 3 to 5
• 5 White Algae to expand from 5 to 7
• 1 Dwarf Scroll I, 1 Dwarf Scroll II, or 2 Refined Quartz to expand from 7 to 10

The pond’s output becomes more varied as the population increases. At lower populations, Ghostfish Roe is the guaranteed result, while higher populations allow additional items to enter the pool:

• Population 1–2: only Roe
• Population 3–8: Roe remains common, with Quartz becoming possible
• Population 9–10: Roe is less dominant, and Quartz, White Algae, Refined Quartz, and Pale Broth can also appear

Ghostfish can also be used in the Sewing Machine to create the dyeable Fish Shirt. This gives it a niche cosmetic use beyond fishing and pond management.

A few quest-related uses also make Ghostfish valuable to keep in reserve. Two Ghostfish may be requested by Dorado, Lingcod, or Pike in a Fish Pond quest when increasing a pond from 7 to 10 capacity. Three Ghostfish may also be requested by the Raccoon at the Giant Stump, either as part of his fifth request or any request from the sixth onward.