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Petit PlanetField Guide

Creature record

Light's Bitterling - Petit Planet Creature

Where to find Light's Bitterling in Petit Planet: habitat, season, time, weather, catch method, size range and sell values from the Final Beta.

Final Beta dataVerified October 30, 2026Freshwater FishAquatic CreaturesAll RegionsMain planet
Rare#038Aquatic Creatures

Light's Bitterling

River mussels also rely on it to give birth to baby mussels.

River Year-Round All Day
On this page
Type
Freshwater Fish
Group
Fish of All Seasons
Habitat
River
Distribution
All Regions
Season
Year-Round
Time
All Day
Weather
Any Weather

Size & value

8 – 16 cm

Species size range recorded in the Final Beta.

★★★ large47 Dough
★★ medium40 Dough
★ small36 Dough

Quality and star rating both affect the sale price. MAX-size catches have a glowing aura.

Use the Fishing Rod. The exact approach depends on the creature’s category and, for shore-dwellers, its species type.

  1. Cast the Fishing Rod into the right water: rivers and lakes for freshwater fish, coastal waters for saltwater fish.
  2. Wait for the nibbles, then strike when the line bites down.
  3. Higher-quality saltwater fish need a slow reel-in. Keep the line from snapping instead of holding the button down.

First catch: the creature is added to the Omnidex. Offer it to Mors at the Omni-Gallery to put it on display and unlock its Omnipedia entry.

Habitat: River. Distribution: All Regions.

Season: Year-Round. Time: All Day. Weather: Any Weather. If two of those tags are restrictive, check the creature tracker before you set out.

Coolwater Zone · Rhodeus sinensis

The Light's Bitterling lays its eggs inside freshwater mussels. It might seem like the bitterling is "using" the mussel, but as it gets close, the mussel also releases its own glochidia to latch onto the fish's body as parasites.

However, this seemingly mutual relationship comes with an "unfair" small print: the bitterling merely "rents" a temporary space inside the mussel, whereas the mussel's parasitic larvae can have lasting effects on the poor fish.

Where this data comes from

Compiled from official Petit Planet announcements and the community-maintained Petit Planet Wiki (CC BY-SA 4.0), then checked against the Final Beta build. Data snapshot: October 30, 2026. Values can change before the December 4, 2026 launch.

Fan-made reference. Game names and assets belong to HoYoverse. See sources & credits.

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↑ ↓ to browse · ↵ to openData snapshot · Oct 30, 2026