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Fish Freshwater Care: easy Peaceful

Eel Loach

Pangio anguillaris
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Other names: Kuhli, Acanthophthalmus anguillaris
Group: Loaches and bottom dwellers · Family: Cobitidae · Origin: Southeast Asia — Borneo, Sumatra, the Malay Peninsula, Thailand and the Mekong basin

One of the longest kuhlis (12 cm), with a plain gray body as slender as a worm. It is unassuming but hardy; it lives in a group over soft sand.

Will it suit my tank?

Last updated October 16, 2026

Temperature
23–28°C
pH
6–7.5
Hardness
1–8 dGH
Adult size
12 cm
Minimum tank size
60 liters
Social structure
School
Group
at least 5, ideally 8+
Swimming zone
Bottom
Diet
Omnivore
Breeding
Other

Water parameters

Temperature23–28°C
pH6–7.5
General hardness (GH)1–8 dGH
Recommended range
May escape, needs a lid Considered shrimp safe Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

The eel loach is one of the slimmest and longest kuhli species; adults reach 10–12 cm. Its body is mostly plain gray or gray-brown; some populations show a thin lateral line or small dark spots. It has no nasal barbels. Because it is spread over a wide area, it is debated whether it is a single species or several very similar ones.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 60 liters for a group of 5–6.
  • 23–28°C, pH 6–7.5, soft water.
  • Fine, soft sand is essential; roots, leaves and narrow shelters.
  • Gaps in the lid should be closed and a sponge fitted over the filter intake.

Diet

October 16, 2026 · Suggest an edit

It searches the sand for small insect larvae and crustaceans. Offer sinking granules and tablets, frozen daphnia, brine shrimp and bloodworms.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

Extremely peaceful; it hides in narrow corners and in the sand all day and roams as a group in the evening. It may eat eggs and small fry.

Good companions: rasboras, tetras, dwarf gouramis, corydoras, other kuhlis, shrimp.

Avoid: large fish that could swallow it, cichlids that claim the bottom, aggressive botias.

A short profile for this species

The Eel Loach page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026