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FishFreshwaterDifficult

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Splash Tetra / Spraying Characin

Copella arnoldi

The only fish that lays eggs OUT of water. The male splashes them every 15 minutes for days.

Family
Lebiasinidae
Origin
Sud America (Guyana, Suriname, basso Amazzonia)
Tank use
Used in 0 tanks
Temperature

24 °C - 28 °C

pH

6 - 7.5

Water type

Freshwater

Tank level

Surface

Adult size

6 cm

Description

Geographic Origin and Biotope: Native to forest streams of Guyana, Suriname, and lower Amazon. Calm waters where branches and leaves hang centimeters above the surface — natural platforms for its unique reproductive strategy.

Taxonomy and Morphology: Lebiasinidae, sleek characin (max 7-8 cm). Powerful caudal fin generating thrust for aerial leaps. Small upturned mouth for surface insect capture.

Social Behavior: The wonder: male and female leap simultaneously onto an overhanging leaf, deposit and fertilize eggs in a split second, then fall back. This synchronized jump repeats 5-10 times per spawning event.

Coloration and Sexual Dimorphism: Transparent amber-gold with a dark lateral line. Males have larger fins and slightly longer, pointed anal fin.

Care and observations

Tank Setup: 80+ liters with water level 10-15 cm below the lid to allow jumping space. Robust overhanging leaves (Pothos, emergent Anubias) positioned within jumping reach above the surface.

Feeding: Specialized surface insectivore. Accepts floating flakes, artemia nauplii, wingless Drosophila, daphnia. Small mouth.

Water Quality: Soft (GH 2-10), acidic (pH 5.5-7.0), 24-28°C. High humidity in the air space above the water is essential for egg survival.

Compatibility: Peaceful with any Amazonian community fish. Avoid aggressive surface dwellers that would disrupt breeding jumps.

Reproduction: The supreme aquarium spectacle. After synchronized leaps, eggs adhere to the emergent leaf. The male positions himself below and splashes water droplets upward with precise tail flicks every 10-20 minutes, 24/7, for 2-3 days straight, keeping eggs moist until hatching. Unique behavior in the entire animal kingdom.

Risks: Main risk is reproductive failure from improper leaf positioning. Escape risk is constant since the fish is designed to jump.

Fish profile

Tank level
Surface
Adult size
6 cm
GH
2 dGH - 10 dGH
KH
n/a
TDS
n/a
Conductivity
n/a

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.