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Ancistomus sp. L163

Big Spot Peckoltia · L163

Authority not recorded

Formerly Peckoltia sp.

Last revised 2026

On this page10 sections

Quick facts

Length
110mm SL4in SL
Tank base
75 × 30cm30 × 12in
Temp
23–26°C73–79°F
pH
6.5–7.2
Hardness
5–12dGH

Difficulty3 of 8 measures

Moderate

How the rating is worked out

Space
medium tank
Water
needs a steady pH
Temp
needs a steady temperature
Diet
unknown
Temperament
unknown
Social
unknown
Compatibility
unknown

Other demands

Each of these can raise the rating on its own, whatever the measures above say.

Hardiness
unknown

The big spot peckoltia (L163) is an undescribed suckermouth catfish collected from the Rio Pará in the Brazilian Amazon. Trade fish are often confused with the very similar L013, and the two are only easily told apart as they mature: L163 keeps its spotted pattern while L013 tends to become duller. It is placed in the genus Ancistomus. Newly imported fish should have a rounded belly and eyes that are not sunken.

Distribution

So far it's only been collected from the Rio Pará in the Brazilian Amazon.

Habitat

No specific data is available.

Aquarium size

Standard length
110mm SL4in SL
Aquarium base
75 × 30cm30 × 12in
Volume
~68litres~18US gal

A 75 ∗ 30 ∗ 30 cm30 ∗ 12 ∗ 12 in - ~68 litres~18 US gal is easily big enough to hold one or two of these.

Maintenance

It does well in a stream-type setup with a gravel or sand substrate, rounded stones, rocks, water worn wood and a high level of flow. Live plants tend not to do so well under these conditions, although some of the tougher varieties such as Vallisneria and Anubias sp., java fern (Microsorum pteropus)or java moss (Vesicularia dubyana) should be ok.

You can also keep this species in a more general set-up, provided the water is clean and well-oxygenated.

Water conditions

Temperature
23–26°C73–79°F
pH
6.5–7.2
Hardness
5–12dGH

Temperature: 23 – 26 °C73 – 79 °F

pH: 6.5 - 7.2

Hardness: 5 - 12°H

These recommendations come from this profile’s own figures. They contain affiliate links, so we may earn a commission.

Diet

It is omnivorous and should be offered a varied diet. Alternate sinking dried foods with vegetable matter such as blanched spinach or Spirulina and live and frozen stuff such as bloodworm or Daphnia. Some specimens also develop a taste for the leaves of softer-leaved aquarium plants.

Behaviour and compatibility

A good choice for the community tank, being both attractive and of manageable size. It can be kept with most peaceful species, but we prefer it to see it in a South American set-up with characins, peaceful cichlids and catfish such as Corydoras and other Loricariids. If you're keeping more than one, ensure each has it's own refuge and expect some territorial confrontations.

Sexual dimorphism

Unknown.

Reproduction

Unreported in the hobby.

Notes

Known in the trade as the big spot peckoltia, this species is placed in the genus Ancistomus. It remains undescribed. It's also often confused with the very similar-looking L013, another undescribed fish. These two species can only easily be distinguished as they mature, as L163 retains its spotted patterning, while L013 tends to become somewhat duller.

When buying this fish check that it has a rounded belly and that its eyes aren't sunken. These are classic signs of emaciation in newly imported Loricariids, and fish in this condition do not often survive for long.

How the name has changed

  1. Moved from Peckoltia sp. to Ancistomus sp. L163.

    2015Three new species of saddled loricariid catfishes, and a review of Hemiancistrus, Peckoltia, and allied genera (Siluriformes)

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Also missing: photograph credits, a recorded distribution, taxonomic authority, etymology.

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