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Red-line lizard tetra

Iguanodectes geisleri

Also known as red line lizard tetra, geisler's tetra, red-lined lizard tetra, lizard tetra, red line tetra

Red-line lizard tetra
Photo: Cedricguppy - Loury Cédric, CC BY-SA 4.0, via Wikimedia Commons
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A slim, pike-shaped little tetra with a silvery body and a bright red to orange line running along the upper flank. It is kept for its active, tight shoaling in the upper water layers and suits soft-water blackwater community tanks.

Care at a glance

Care level
Moderate
Temperament
Peaceful
Adult size
5.5 cm
Temperature
23 to 28 °C
pH
4.5 to 7
Smallest tank
80 litres
Keep as
Shoal of 8 or more
Diet
Omnivore: small live and frozen foods such as bloodworm and daphnia, quality flakes and micro pellets, with some plant matter
Swims
Top of the tank
Lifespan
3 to 5 years
Water
Freshwater
Wild range
Rio Negro basin, Brazil and Venezuela

Breeding

An egg scatterer with no parental care, but it has rarely been bred in home aquariums and most stock is wild caught.

Good to know

A quick, nervous jumper, so keep a tight-fitting lid and avoid boisterous or much larger tankmates. Wild fish can arrive thin and need careful acclimatisation to soft, clean water.