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Fish Freshwater Care: medium Peaceful

Splash Tetra

Copella arnoldi
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Other names: Spraying characin, Jumping characin, Copella, Copeina arnoldi
Group: Tetras and characins · Family: Lebiasinidae · Origin: South America — lower Amazon and the coastal rivers of Guyana, Suriname and French Guiana

An interesting relative of the pencilfish that leaps out of the water to stick its eggs onto leaves above the surface, while the male keeps them moist by splashing water on them. It is an excellent jumper; a lid is essential.

Will it suit my tank?

Last updated October 16, 2026

Temperature
24–28°C
pH
6–7.5
Hardness
2–12 dGH
Adult size
6 cm
Minimum tank size
60 liters
Lifespan
3–5 years
Social structure
School
Group
at least 6, ideally 8+
Male–female ratio
Dişi ağırlıklı
Swimming zone
Top
Diet
Omnivore
Breeding
Other

Water parameters

Temperature24–28°C
pH6–7.5
General hardness (GH)2–12 dGH
Recommended range
May escape, needs a lid Considered shrimp safe Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

The splash tetra is a slender species from the family Lebiasinidae and a relative of the pencilfish. Its real fame comes from its extraordinary breeding behavior: the pair leaps out of the water together and sticks its eggs to a leaf or to the glass a few centimeters above the surface. Until the eggs hatch, the male regularly splashes water on them with his tail to keep them moist.

Males are larger and longer-finned and carry a dark spot surrounded by a light color on the dorsal fin. It is a peaceful, hardy species that lives near the surface.

Natural Habitat

October 16, 2026 · Suggest an edit

It lives in slow-flowing streams and ponds shaded by overhanging plants in the coastal rivers of the lower Amazon and the Guyana region. These settings, where leaves hang over the water, suit the species' way of breeding.

Tank Setup

October 16, 2026 · Suggest an edit
  • Volume: at least 60 liters for a group of 6–8.
  • Water: 24–27°C, pH 6–7.5, soft to moderately hard water.
  • Lid: it is an excellent jumper; a tight-fitting lid is essential. Keeping the water level a few centimeters below the lid also supports breeding behavior.
  • Decor: floating plants, stem plants reaching the surface and leaves emerging from the water are suitable.

Diet

October 16, 2026 · Suggest an edit

Omnivorous, and it mostly takes its food from the surface. Floating flakes and granules, frozen mosquito larvae, daphnia, brine shrimp and fruit flies are suitable.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

Peaceful, but during breeding males guard the area where the eggs are against other fish. It does not harm other species and leaves adult shrimp alone.

Good companions: small tetras, pencilfish, rasboras, corydoras, otocinclus, dwarf cichlids.

Avoid: active, greedy species at the surface, fin nippers, large predators.

Group and Colony Structure

October 16, 2026 · Suggest an edit

It lives in a loose group: at least 6, ideally 8 individuals. If there is more than one male, each picks its own spot for breeding. A female-heavy ratio reduces competition between males.

Breeding

October 16, 2026 · Suggest an edit

Breeding is the most fascinating aspect of this species. The male chooses a suitable leaf or glass surface; the pair leaps out of the water side by side, clings above the surface for a brief moment and sticks a few eggs with each leap. Afterward, the male splashes water onto the eggs with his tail every few minutes. The eggs hatch within 2–3 days and the fry drop into the water. The fry are fed first infusoria, then newly hatched brine shrimp.

Health and Common Problems

October 16, 2026 · Suggest an edit
  • Jumping: the most common cause of losses in a tank without a lid.
  • White spot (ich): may appear after transport.
  • General: it is hardy; it rarely falls ill in mature, clean water.

Sexing

October 16, 2026 · Suggest an edit

Males are larger, more colorful and longer-finned; the upper lobe of the tail fin is longer and the spot on the dorsal fin is distinct. Females are smaller and plainer, with short fins.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026