The five-fish progression set

  • Midnight Fish
  • Crimson Cod
  • Blue Pike
  • Silverlight Eel
  • Chum Salmon

Other breeding-only results

The structured fish index lists five additional tank-only species: Blackback Sardine, Emperor TunaTunaA valuable saltwater fish used in the checked price table., Grass Leaf Slug, Mist Eel, and Terror Fish. English names can vary between community translations; match the icon and in-game encyclopedia entry before committing a long breeding cycle.

What the tank is doing

  1. 01

    Unlock and craft a Fish TankFish TankA farm facility used for fish breeding and breeding-only species. through the ranching and fishing technology path.

  2. 02

    Place the parent fish needed for the target combination into the tank.

  3. 03

    Keep feed above zero; an empty feed reserve stops progress and disables accessories.

  4. 04

    Collect the resulting roe, then hatch and raise it into the target fish.

SOURCES, NOT DECORATION

Sources checked

3 links reviewed

These links back up the mechanic, route, or noted uncertainty. Page wording, structure, and diagrams are original work.

  • 01
    CommunitySteam: Fish breeding

    Current player question and confirmation that many fish are cultivation-only with irregular breeding conditions.

  • 02
    Structured referenceHuiji Wiki: Fish index

    Structured separation of wild, mixed-source, and breeding-only fish.

  • 03
    Structured referenceFandom: Treaty Port

    Structured trade table for the five-fish Mutant Colors Study and Auto-Harvest Chamber reward.