Thicklip gymnogeophagus
Gymnogeophagus labiatus
Also known as Labiatus eartheater
FreshwaterFish

Care at a glance
- Temperature
- 61–79°F
- 16–26°C
- pH
- 6.5–7.8
- Adult size
- 7.1 in
- 18 cm
- Minimum tank
- 79 gal
- 300 L
- Temperament
- Mostly peaceful
- Social behavior
- Social
- Swim level
- Bottom
- Difficulty
- Medium
- Breeding
- Mouthbrooder · Medium
- Rarity
- Common
- Family
- Cichlidae
- Origin
- Rio Grande do Sul and Uruguay drainages
Overview
The thicklip gymnogeophagus is a subtropical eartheater for the coldwater cichlid niche. It is moderately demanding to keep.
Did you know
Male thicklip gymnogeophagus reach their peak red and blue only after a proper cold season. Without one, they stay dull, and their colors never quite pay out in full.
Caring for the thicklip gymnogeophagus
Keep a group of thicklip gymnogeophagus in a tank of at least 79 gal (300 L). Give them a sandy floor and stones to probe.
They need a genuine winter, so let the temperature fall through the cool months. Over the year, let the water range across 61 to 79°F (16 to 26°C), at a pH of 6.5 to 7.8. Holding them at a tropical temperature year round shortens their life.
Feed sinking foods and frozen fare, and taper off as the water cools. The thicklip gymnogeophagus is peaceful for a cichlid of its size, so calm community tank mates suit it.
Males develop a nuchal hump with age. It is a mouthbrooder, and breeding it is of moderate difficulty.
Good to know
The thicklip gymnogeophagus, Gymnogeophagus labiatus, has thickened, fleshy lips that it uses to probe crevices in stone for invertebrates. Unrelated cichlids in Africa and Central America share the same adaptation. It is also known as the Labiatus eartheater.
In the wild
The thicklip gymnogeophagus lives in rocky, sandy streams in Rio Grande do Sul and Uruguay, where the seasons swing hard.
Weekly picks
Tank mates
The thicklip gymnogeophagus is a mostly peaceful, social 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.

Pale chub
Zacco platypus
Freshwater7.9 in (20 cm) · 79 gal (300 L)54–75°F (12–24°C)
Largescale four-eyed fish
Anableps anableps
FreshwaterBrackish11.8 in (30 cm) · 70 gal (265 L)77–88°F (25–31°C)
Chameleon whiptail
Pseudohemiodon apithanos
Freshwater6.7 in (17 cm) · 79 gal (300 L)75–82°F (24–28°C)
Slender hemiodus
Hemiodus gracilis
Freshwater7.1 in (18 cm) · 66 gal (250 L)73–82°F (23–28°C)
Narrow hatchetfish
Triportheus angulatus
Freshwater9.8 in (25 cm) · 79 gal (300 L)73–82°F (23–28°C)
Circular whiptail
Planiloricaria cryptodon
Freshwater8.7 in (22 cm) · 79 gal (300 L)75–82°F (24–28°C)
Common questions
What size tank does a thicklip gymnogeophagus need?
A thicklip gymnogeophagus needs at least 79 gal (300 L). It spends most of its time in the bottom.
What temperature and pH does a thicklip gymnogeophagus need?
A thicklip gymnogeophagus is comfortable at 61–79°F (16–26°C) with a pH of 6.5–7.8.
What does a thicklip gymnogeophagus eat?
A thicklip gymnogeophagus eats sinking foods and frozen fare. Feed it less as the water cools.
How big does a thicklip gymnogeophagus get?
An adult thicklip gymnogeophagus reaches about 7.1 in (18 cm).
How can you tell a male thicklip gymnogeophagus from a female?
Males develop a nuchal hump as they age.
How does a thicklip gymnogeophagus breed?
The thicklip gymnogeophagus is a mouthbrooder. Breeding it is of moderate difficulty.
Related species
7.1 in (18 cm)79 gal (300 L)61–79°F (16–26°C)Smoothcheek eartheater
Gymnogeophagus gymnogenys
7.1 in (18 cm) · 79 gal (300 L)
- 6.1 in (15.5 cm)66 gal (250 L)61–79°F (16–26°C)
Uruguayan eartheater
Gymnogeophagus australis
6.1 in (15.5 cm) · 66 gal (250 L)
5.9 in (15 cm)53 gal (200 L)64–79°F (18–26°C)Stripefin eartheater
Gymnogeophagus rhabdotus
5.9 in (15 cm) · 53 gal (200 L)
5.1 in (13 cm)66 gal (250 L)61–79°F (16–26°C)Longbody eartheater
Gymnogeophagus mekinos
5.1 in (13 cm) · 66 gal (250 L)
4.7 in (12 cm)66 gal (250 L)61–79°F (16–26°C)Tiraparae eartheater
Gymnogeophagus tiraparae
4.7 in (12 cm) · 66 gal (250 L)
4.3 in (11 cm)53 gal (200 L)61–79°F (16–26°C)Meridionalis eartheater
Gymnogeophagus meridionalis
4.3 in (11 cm) · 53 gal (200 L)