Pseudogobio vaillanti – Vaillant’s Gudgeon (~20 cm)

Description

Pseudogobio vaillanti is a freshwater ray-finned fish in the gudgeon family (Gobionidae), native to China  It typically reaches about 20 cm in total length and is listed as Least Concern on the IUCN Red List 

Moderately common in its natural range, detailed accounts of its coloration and behavior are limited in publicly accessible sources, reflecting its rarity in captivity.

Care Instructions (Wild-Inspired Guidance)

• Tank Size: Minimum 75 L (20 gal), larger preferred to accommodate its size and allow natural swimming space.

• Water Conditions:

  • Temperature: Subtropical — likely 18–24 °C (65–75 °F)

  • pH: Neutral to slightly alkaline (≈7.0–8.0)

  • Hardness: Soft to moderately hard

• Setup: A river-mimicking aquascape with fine gravel or sand, gentle flow, and some current-friendly décor (rocks or driftwood).

• Diet: As a gudgeon, expect it to be a benthic omnivore; a diet of sinking pellets, live/frozen invertebrates, and algae wafers is appropriate.

• Behavior & Compatibility: Likely a peaceful bottom-dwelling fish; small groups or community setups with mid-water species should work.

• Maintenance: Prioritize clean, well-filtered water and steady conditions to support natural behavior in a captive environment.