Ghost pleco
Ancistomus snethlageae
Also known as L141, Snethlage's pleco
Care at a glance
- Temperature
- 77–84°F (25–29°C)
- pH
- 6.0–7.4
- Adult size
- 8.7 in (22 cm)
- Minimum tank
- 66 gal (250 L)
- Temperament
- Peaceful
- Social behavior
- Solitary
- Swim level
- Bottom
- Difficulty
- Medium
- Breeding
- Medium
- Rarity
- Rare
- Origin
- Tapajós and Tocantins basins, Brazil
- Family
- Loricariidae
Overview
Keep this pale, heavy-bodied pleco on its own, as one settled adult per tank; it is peaceful toward other fish but does not need or want company of its own kind. It stakes out a cave or a shaded gap in the rockwork and grows fairly large, so pair it with calm mid-water community fish rather than tiny nervous ones. It is an easygoing omnivore that takes sinking pellets, algae wafers, and frozen foods such as bloodworm, and it grazes biofilm off wood and stone. Once its cave is chosen it is undemanding. Allow a tank of at least 250 liters with rock, driftwood, and steady flow.
In the wild
It comes from the Tapajos and Tocantins basins of eastern Brazil, clear rocky rivers with warm water and a good current over stone and wood. A tank that echoes that has plenty of smooth rock and driftwood arranged into caves, a sand or fine gravel floor, and brisk, well-oxygenated flow. Keep the water warm at roughly 25 to 29 C with a pH of 6.0 to 7.4, and stay on top of water changes.
Good to know
Ancistomus snethlageae is a loricariid catfish that grows to about 22 centimeters, grey with faint darker spotting that dulls with age. It carries the L-numbers L141 and L215 in the trade. It is a cave-spawning egg layer of moderate breeding difficulty, with the male tending the eggs. The species is named for Emilie Snethlage, a German-Brazilian naturalist.
Did you know
Its name honors Emilie Snethlage, a naturalist who led collecting expeditions deep into the Amazon in the early 1900s and went on to direct a major Brazilian museum, at a time when very few women held such posts.
Tank mates
Ghost pleco is a peaceful, solitary species that keeps to the bottom. These picks match on water type, temperature, pH, size and temperament.

Marble whiptail
Loricaria simillimaFreshwater10.2 in (26 cm)66 gal (250 L)75–82°F (24–28°C)Wolverine pleco
Hopliancistrus wolverineFreshwater7.9 in (20 cm)66 gal (250 L)81–88°F (27–31°C)
Beardless barb
Cyclocheilichthys apogonFreshwater7.9 in (20 cm)66 gal (250 L)72–82°F (22–28°C)Peppermint pleco
Spectracanthicus punctatissimusFreshwater4.7 in (12 cm)66 gal (250 L)79–86°F (26–30°C)Blackline poropuntius barb
Poropuntius melanogrammusFreshwater7.9 in (20 cm)66 gal (250 L)64–77°F (18–25°C)Tiraparae eartheater
Gymnogeophagus tiraparaeFreshwater4.7 in (12 cm)66 gal (250 L)61–79°F (16–26°C)
Common questions
What size tank does a Ghost pleco need?
A Ghost pleco needs at least 66 gal (250 L). It spends most of its time in the bottom.
What temperature and pH do Ghost pleco need?
Ghost pleco are comfortable at 77–84°F (25–29°C) with a pH of 6.0–7.4.
How big do Ghost pleco get?
An adult Ghost pleco reaches about 8.7 in (22 cm).
Where to buy
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Related species

Big spot pleco
Ancistomus feldbergaeFreshwater7.9 in (20 cm)66 gal (250 L)79–86°F (26–30°C)
Rubber pleco
Parancistrus aurantiacusFreshwater8.7 in (22 cm)79 gal (300 L)77–84°F (25–29°C)Circular whiptail
Planiloricaria cryptodonFreshwater8.7 in (22 cm)79 gal (300 L)75–82°F (24–28°C)Peruvian royal whiptail
Sturisoma nigrirostrumFreshwater8.7 in (22 cm)66 gal (250 L)75–82°F (24–28°C)Tamana royal farlowella
Sturisomatichthys tamanaeFreshwater8.7 in (22 cm)53 gal (200 L)75–82°F (24–28°C)Xingu peppermint pleco
Parancistrus nudiventrisFreshwater8.7 in (22 cm)79 gal (300 L)81–88°F (27–31°C)