Thunder royal pleco (L027)
Panaque armbrusteri
Also known as L027, Tapajos Royal Pleco, Gold Line Royal Pleco, Thunder Line Royal Pleco
FreshwaterFish
Care at a glance
- Temperature
- 77–84°F
- 25–29°C
- pH
- 6.0–7.5
- Adult size
- 17.7 in
- 45 cm
- Minimum tank
- 151 gal
- 570 L
- Temperament
- Mostly peaceful
- Social behavior
- Solitary
- Swim level
- Bottom
- Difficulty
- Difficult
- Breeding
- No record
- Rarity
- Rare
- Family
- Loricariidae
- Origin
- Rio Tapajos in Para, Brazil.
Overview
A large, slow-growing pleco that needs a tank of about 570 liters or more with several types of soft driftwood always available. Its gut depends on wood fiber, so provide wood as a staple and supplement with fresh vegetables like zucchini and some sinking foods, keeping protein light. Peaceful toward most tankmates but territorial with other large bottom dwellers as it matures.
In the wild
Lives in large, fast rivers of the Tapajos among sunken logs and rock, where it spends its time rasping on submerged wood. As a true Panaque it is a wood eater, grinding driftwood with spoon-shaped teeth and digesting the fiber and biofilm, so driftwood is essential to its health rather than optional. Wants strong flow, oxygen, and plenty of soft wood.
Good to know
Described as Panaque armbrusteri, the Tapajos royal is one of the big true royal plecos, marked with bold gold or cream lines on a dark olive body that give the thunder line and gold line trade names. Panaque are among the very few fish able to live largely on wood. Their spoon-shaped teeth are a specialized adaptation for scraping it.
Did you know
Panaque host special gut microbes that help break down cellulose, which is how a fish manages to make a living eating driftwood.
Weekly picks
Tank mates
Thunder royal pleco (L027) is a mostly peaceful, solitary species that keeps to the bottom. These picks share a community profile with it, are safe together in both directions, and overlap on water type, temperature and pH.

Sucker barb
Barbichthys laevis
Freshwater12.2 in (31 cm) · 159 gal (600 L)72–82°F (22–28°C)
Largescale four-eyed fish
Anableps anableps
FreshwaterBrackish11.8 in (30 cm) · 70 gal (265 L)77–88°F (25–31°C)
Fowler's hemiodus
Bivibranchia fowleri
Freshwater7.5 in (19 cm) · 106 gal (400 L)75–84°F (24–29°C)False hemiodus
Argonectes longiceps
Freshwater11.8 in (30 cm) · 159 gal (600 L)75–84°F (24–29°C)
Giant river hatchetfish
Triportheus rotundatus
Freshwater9.8 in (25 cm) · 79 gal (300 L)73–82°F (23–28°C)
Gold-spotted doradid
Wertheimeria maculata
Freshwater11.8 in (30 cm) · 106 gal (400 L)68–79°F (20–26°C)
Common questions
What size tank does a Thunder royal pleco (L027) need?
A Thunder royal pleco (L027) needs at least 151 gal (570 L). It spends most of its time in the bottom.
What temperature and pH does a Thunder royal pleco (L027) need?
A Thunder royal pleco (L027) is comfortable at 77–84°F (25–29°C) with a pH of 6.0–7.5.
How big does a Thunder royal pleco (L027) get?
An adult Thunder royal pleco (L027) reaches about 17.7 in (45 cm).
Related species
16.9 in (43 cm)125 gal (473 L)72–82°F (22–28°C)Royal pleco
Panaque nigrolineatus
16.9 in (43 cm) · 125 gal (473 L)
11.8 in (30 cm)119 gal (450 L)73–82°F (23–28°C)Blue-eyed pleco
Panaque cochliodon
11.8 in (30 cm) · 119 gal (450 L)
23.6 in (60 cm)264 gal (1,000 L)77–84°F (25–29°C)Volkswagen pleco
Panaque schaeferi
23.6 in (60 cm) · 264 gal (1,000 L)
9.8 in (25 cm)79 gal (300 L)77–84°F (25–29°C)Papa panaque
Panaque bathyphilus
9.8 in (25 cm) · 79 gal (300 L)
17.7 in (45 cm)100 gal (380 L)73–84°F (23–29°C)Sailfin pleco
Pterygoplichthys disjunctivus
17.7 in (45 cm) · 100 gal (380 L)
15.7 in (40 cm)85 gal (320 L)72–86°F (22–30°C)Common pleco
Hypostomus plecostomus
15.7 in (40 cm) · 85 gal (320 L)
