Creature record
River Tonguesole - Petit Planet Creature
Where to find River Tonguesole in Petit Planet: habitat, season, time, weather, catch method, size range and sell values from the Final Beta.
River Tonguesole
It has a spine, but planarians don't.
On this page
At a glance
- Type
- Freshwater Fish
- Group
- Serene Islet Shallows (Hexia)
- Habitat
- River
- Distribution
- Islet Specialty from Hexia Zone H83
- Season
- Year-Round
- Time
- Nighttime
- Weather
- Any Weather
Size & value
16 – 32 cm
Species size range recorded in the Final Beta.
Quality and star rating both affect the sale price. MAX-size catches have a glowing aura.
How to catch River Tonguesole
Use the Fishing Rod. The exact approach depends on the creature’s category and, for shore-dwellers, its species type.
- Cast the Fishing Rod into the right water: rivers and lakes for freshwater fish, coastal waters for saltwater fish.
- Wait for the nibbles, then strike when the line bites down.
- 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.
Where and when to find it
Habitat: River. Distribution: Islet Specialty from Hexia Zone H83 — this is an islet specialty, so plan it into a Starsea Voyage rather than a planet sweep..
Season: Year-Round. Time: Nighttime. Weather: Any Weather. If two of those tags are restrictive, check the creature tracker before you set out.
Omnipedia
The River Tonguesole is one of the few flatfish that can live entirely in freshwater.
At a glance, it does resemble a planarian. Other than their body sizes, the two can also be distinguished by their flexibility. After all, as a vertebrate with a skeleton, the River Tonguesole moves much more "stiffly."
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.
- Creature — The Petit Planet Wiki
- The Petit Planet Wiki (community)
- Petit Planet official website
- Community wiki page
Fan-made reference. Game names and assets belong to HoYoverse. See sources & credits.