Harlequin moth catfish
Pseudolaguvia ribeiroi
Also known as Painted moth cat, Harlequin catfish
Care at a glance
- Temperature
- 68–79°F (20–26°C)
- pH
- 6.0–7.5
- Adult size
- 1.6 in (4 cm)
- Minimum tank
- 11 gal (40 L)
- Temperament
- Peaceful
- Social behavior
- Social
- Swim level
- Bottom
- Difficulty
- Medium
- Breeding
- No record
- Rarity
- Rare
- Origin
- Ganges and Brahmaputra foothills
- Family
- Erethistidae
Overview
The harlequin moth catfish is a small, boldly saddled micro-catfish that likes clean, flowing water over gravel. It is a peaceful, sociable fish, so keep several together and give them calm, small tankmates that will not outcompete them, or a quiet species setup. They shelter among stones by day and feed at night, so offer fine sinking foods in the evening, such as frozen daphnia, microworm, baby brine shrimp and small sinking wafers. A tank of at least 40 liters with fine sand or gravel, pebbles and a gentle current suits a troupe.
In the wild
It lives in clear, flowing foothill streams of the Ganges and Brahmaputra drainages in Nepal and northern India, over sand, gravel and stone. Recreate that with a sand and fine-gravel bottom, water-worn pebbles for cover, and steady, well oxygenated flow from good filtration. Keep the water close to neutral, about pH 6.0 to 7.5, at 20 to 26 C, clean and stable.
Good to know
Pseudolaguvia ribeiroi, also called the painted catfish, is a moth catfish in the family Erethistidae reaching about 4 cm. It wears contrasting cream and dark saddle bands that break up its outline against a stony bottom, and has the rough skin and locking fin spines typical of the group. Its breeding is not recorded in home aquaria.
Did you know
It answers to two names for one coat. This species is sold as both the harlequin and the painted moth catfish, each a nod to the bold, jester-like saddle bands that set it apart from its plainer relatives.
Tank mates
Harlequin moth catfish is a peaceful, social species that keeps to the bottom. These picks match on water type, temperature, pH, size and temperament.
Fourspotted toothcarp
Phallichthys quadripunctatusFreshwater1.4 in (3.5 cm)11 gal (40 L)68–86°F (20–30°C)
Mango loach
Physoschistura mangoFreshwater1 in (2.5 cm)11 gal (40 L)68–77°F (20–25°C)
Wandering Snail
Ampullaceana balthicaFreshwater0.8 in (2 cm)11 gal (40 L)50–84°F (10–29°C)
African Butterfly Barb
Barbus hulstaertiFreshwater1.4 in (3.5 cm)11 gal (40 L)63–75°F (17–24°C)Jewel killifish
Aphyosemion exiguumFreshwater1.6 in (4 cm)11 gal (40 L)68–77°F (20–25°C)
Gold ring danio
Danio tinwiniFreshwater1.2 in (3 cm)11 gal (40 L)64–79°F (18–26°C)
Common questions
What size tank does a Harlequin moth catfish need?
A Harlequin moth catfish needs at least 11 gal (40 L). It spends most of its time in the bottom.
What temperature and pH do Harlequin moth catfish need?
Harlequin moth catfish are comfortable at 68–79°F (20–26°C) with a pH of 6.0–7.5.
How big do Harlequin moth catfish get?
An adult Harlequin moth catfish reaches about 1.6 in (4 cm).
Where to buy
Some links may not be the exact species or variety.
…or ask your local fish store.
Appears in
Freshwater fish · Nano fish · Community fish · Bottom dwellers
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Related species

Cheetah moth catfish
Pseudolaguvia shawiFreshwater1.5 in (3.8 cm)11 gal (40 L)68–79°F (20–26°C)
Rusty moth catfish
Pseudolaguvia muricataFreshwater1.2 in (3 cm)11 gal (40 L)68–79°F (20–26°C)
Butterfly moth catfish
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Hara minusculaFreshwater1.2 in (3 cm)11 gal (40 L)68–79°F (20–26°C)Filament moth catfish
Hara filamentosaFreshwater2.4 in (6 cm)14 gal (54 L)68–79°F (20–26°C)
Butterfly hara catfish
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