delicate loach (Niwaella delicata)

Family: Cobitidae

delicate loach — a Cobitidae from Japan, peaceful, sociable and slightly nocturnal. Reaches 7.1–10.5 cm; sociable; keep 4–6 so night-time activity stays confident. 18–26 °C.

Care parameters

Water temperature
18–26 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
7.1–10.5 cm
Minimum tank
132 L
Water layer
Bottom-dwelling
Difficulty
Moderate
Temperament
Peaceful, sociable and slightly nocturnal
Origin
Japan

Species overview

A Cobitidae species native to Japan: Niwaella delicata lives bottom-dwelling over sandy stretches of slow rivers. Peaceful, sociable and slightly nocturnal. Adults reach 7.1–10.5 cm. In a community tank it pairs well with Other peaceful bottom fish.

Native biotope

Habitat
Sandy stretches of slow rivers
Flow
Gentle current
Dissolved O₂
Tolerates moderate oxygen levels

Aquascape & hardware

Substrate
Fine sand for burrowing
Hardscape
Smooth stones and driftwood caves
Plants
Low-light tolerant plants

Temperament, diet & tankmates

Schooling
Sociable; keep 4–6 so night-time activity stays confident
Diet
Omnivore that appreciates live or frozen treats
Recommended tankmates
  • Other peaceful bottom fish — Share the lower water without conflict
Avoid keeping with
  • Boisterous feeders — Outcompete slow, nocturnal eaters

Breeding & notes

Sexual dimorphism
Females noticeably plumper when mature
Breeding method
Scatters eggs among fine plants; no aftercare

Frequently asked questions

Is delicate loach easy to keep?

A moderate-level species: peaceful, sociable and slightly nocturnal; stable water matters more than fancy equipment.

What temperature and water chemistry does delicate loach need?

Hold 18–26 °C and keep it stable — 18–26 °C typical for the family. Room temperature stable range.

How big does delicate loach get, and what tank size?

Expect 7.1–10.5 cm as an adult, living bottom-dwelling. A 132 L tank or larger gives it room.

What does delicate loach eat?

Omnivore that appreciates live or frozen treats. It forages naturally over fine sand for burrowing, so let some food reach the bottom.

Can delicate loach live with other fish?

Peaceful, sociable and slightly nocturnal; sociable; keep 4–6 so night-time activity stays confident. Good company: Other peaceful bottom fish — Share the lower water without conflict. Keep away from Boisterous feeders — Outcompete slow, nocturnal eaters.

Where does delicate loach come from?

Native to Japan, where it lives in sandy stretches of slow rivers. Gentle current; Tolerates moderate oxygen levels.

How does delicate loach breed?

Scatters eggs among fine plants; no aftercare. Females noticeably plumper when mature.