Not furry, but we like them anyway.

Gold Nugget Pleco

Baryancistrus xanthellus

Also called L018, L081, L085, L177, LDA060

Young fish are fairly peaceful, but adult males become firmly territorial toward their own kind.

Size	Medium
Length	22.4 cm (9 in)1 2
Coat	Armoured suckermouth catfish
Origin	Endemic to Brazil: the Volta Grande of the Rio Xingu between Belo Monte falls and the mouth of the Rio Iriri, plus the middle and lower Rio Iriri, in Pará1 2
Last checked	2026-09-30

SpeciesShort profile

Eye-catching gold spots on a dark body

Grazes algae and biofilm

Long-term showpiece fish reaching over 20 cm

1 2

Personality what they are like

Young fish are fairly peaceful, but adult males become firmly territorial toward their own kind. Usually kept singly.1

The care rhythm a typical week and year

A typical home-care rhythm for a Gold Nugget Pleco. A starting point, not a vet's advice.

FeedingSmall amounts once or twice a dayevery day
Temperature checkevery day
Water changeAbout 25% of the waterevery week
Water testevery week
Glass cleanevery week
Filter rinseRinse in old tank water, never tap waterevery month

Looks how to spot one

Armoured suckermouth catfish

A sturdy, dark pleco covered in bright yellow-gold spots, with gold edges on the dorsal and tail fins that are broad in young fish and shrink to small tips as it grows. Mature males develop wider, flatter heads and longer pectoral-fin spines.1

Coloursdark brown to black baseyellow to gold spotsyellow fin edges1

Daily activity how busy a day looks

A bottom-dweller from warm, fast, rocky rapids; appreciates strong current and plenty of oxygen.1 2

Grooming and care the hands-on bits

Keep warm water at 27 to 32 C, pH 6.0 to 8.0 and hardness 3 to 15 dGH. Strong filtration, high oxygen and frequent partial water changes are important.1

Home where they are happiest

Seriously Fish recommends a base of at least 120 x 45 cm (about 243 litres). Use rocks and caves to create territories and break lines of sight.1

Food basics what goes in the bowl

Mainly a grazer of algae and biofilm, also taking small invertebrates. Offer sinking foods with vegetable content, gel foods, vegetables, fruit and some bloodworm.1

Company who they like around

Best alone or with medium to large characins that use the upper water, so they stay out of its way.1

The story where it all began

This pleco was popular in the trade for years under many L-numbers before it was formally described in 2011.1 2

Fun facts for the dinner table

1
Before being formally named in 2011 it was traded under at least seven different codes.2
2
Juveniles have broad yellow bands on the dorsal and tail fins, which shrink to small tips in adults.1
3
It lives only in the Xingu and Iriri river systems of Brazil.2
4
Its belly has no bony plates, unlike its armoured back and sides.1

Recognised by the official bits

Taxonomy: Described by Rapp Py-Daniel, Zuanon and de Oliveira in 20112
IUCN Red List: Near Threatened2
Aquarium trade codes: Traded under several codes including L018, L081, L085, L177 and LDA0602

Owner questions the things everyone asks

How often should I feed my Gold Nugget Pleco?

Feed small amounts once or twice a day. Pet Wiki's starting plan is to offer food daily, but watch that your pleco gets enough without overfeeding.1 Pet Wiki plan

What does a Gold Nugget Pleco eat, and what should it never eat?

It mainly grazes on algae and biofilm, and enjoys sinking foods with vegetable content, gel foods, veggies, fruit, and some bloodworm. Avoid any foods not meant for fish, and never give it medicines or human foods without vet advice.1

How much space does a Gold Nugget Pleco need?

Seriously Fish recommends a base of at least 120 x 45 cm, which is about 243 litres. Provide rocks and caves to create territories and break lines of sight.1

What temperature, light or water does a Gold Nugget Pleco need?

Keep warm water at 27 to 32°C, pH 6.0 to 8.0, and hardness 3 to 15 dGH. Strong filtration, high oxygen, and frequent partial water changes are important.1

How often should I clean a Gold Nugget Pleco's home?

Pet Wiki's plan suggests a weekly 25% water change, weekly glass cleaning, and monthly filter rinsing in old tank water (never tap water). Pet Wiki plan

Can a Gold Nugget Pleco live with others?

Young fish are fairly peaceful, but adult males become territorial toward their own kind, so it's best kept alone or with medium to large characins that stay in the upper water.1

How long does a Gold Nugget Pleco live?

Lifespan varies; ask a good breeder or exotic-pet vet for specific expectations for your fish.

Can I handle a Gold Nugget Pleco?

It's best not to handle this fish; it's a bottom-dweller that can be stressed by handling. Enjoy watching it in its tank instead.1

Written from the sources on this page, a few checked guides (VCA, ASPCA, RSPCA) and Pet Wiki's own starting care plan. A friendly guide, not a vet's advice.

Zebra Pleco

Snowball Pleco

Where this comes from

Every fact on this page has a numbered source. Spotted an error? support@petwiki.app.

Baryancistrus xanthellus (Gold Nugget Pleco) - Seriously Fish seriouslyfish.comused for origin, size, care, diet, behaviour, colours
Baryancistrus xanthellus - Wikipedia en.wikipedia.orgused for names, origin, size, taxonomy, IUCN

Checked 2026-09-30. Text is written in our own words from these sources.