Peacock Eel

Lepidocephalichthys annandalei

Photo of aquarium fish Peacock Eel
Natural range
  • Ganges River Basin
  • Brahmaputra River Basin
  • India area
  • Nepal area
LoachesConservation status: Least concern LC

Family:Cobitidae (Loaches)

Other scientific names: Lepidocephalichthys menoni, Lepidocephalus annandalei, Lepidocephalus menoni

The scientific name Lepidocephalichthys annandalei refers to a fish known as the Peacock Eel or Annandale's Loach, belonging to the family Cobitidae (Loaches). It owes its name to Dr. N. Annandale, who was the director of the Zoological Survey of India. Another name, Peacock Eel, reflects the unusual pattern on its tail, which will be described below. This fish is distinguished by its unpretentiousness and high endurance. It can successfully adapt to quite significant changes in the external environment that would be fatal for many other species. Thanks to such exceptional adaptability, ease of maintenance, and peaceful disposition, it is perfectly suited even for beginner aquarists.

Required aquarium volume
40 L
Size in aquarium
3 – 5 cm
Temperature
22 – 26 °C
Temperament
Peaceful (regular)
Parameters
Temperature22 – 26 °C
Water pHSlightly acidic (5.5) – Neutral (7.5)
Water dHVery soft (2) – Hard (15)
Water salinityno salt (freshwater)
Size in aquarium3 – 5 cm
Lifespan4 years
TemperamentPeaceful (regular)
Toward small fishnot a predator
Required aquarium volume40 L
Lightingdimmed or moderate
Substratesoft sandy (including silted)
Water flowweak
FeedingSinking (any)
CareSmall group (3–4 individuals)

Frequently asked questions

The essentials: size, tank volume, water parameters and care

How big does Peacock Eel get?

An adult reaches 3–5 cm in length. Plan the tank around the maximum size: the fish quickly outgrows a cramped setup.

What size aquarium does Peacock Eel need?

The minimum recommended volume is 40 L. A smaller tank speeds up nitrate build-up and raises stress levels.

What water parameters does Peacock Eel need?

Temperature 22–26 °C, pH 5.5–7.5, hardness 2–15 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does Peacock Eel live?

Around 4 years when kept properly. Lifespan depends directly on tank volume, water quality and a varied diet.

Is Peacock Eel aggressive?

Temperament: peaceful (regular). Keep this in mind when choosing tank mates.

How many Peacock Eel should be kept together?

Recommended setup: small group (3–4 individuals). Ignoring this is a common cause of stress and disease.

What does Peacock Eel eat?

Diet type: sinking (any). Feed small portions that are finished within a couple of minutes — overfeeding does more harm than underfeeding.

What is the scientific name of Peacock Eel?

The scientific name of the species is Lepidocephalichthys annandalei, family Cobitidae (Loaches). It also appears in the literature as: Lepidocephalichthys menoni, Lepidocephalus annandalei, Lepidocephalus menoni.

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