Mediterranean Killifish Care Guide
Aphanius fasciatus is a small, banded Mediterranean killifish of brackish lagoons and salt marshes, tolerant of a wide salinity and temperature range.
Compiled by Aquairi from published sources · Published · Updated
Overview
Aphanius fasciatus is a small killifish of the family Cyprinodontidae. FishBase records a maximum of about 6.8 cm total length for males; Wikipedia notes males reach roughly 5.5 cm and females about 6 cm. Males show 10-15 dark transverse bands, while females have indistinct narrow markings.
Taxonomy
- Family: Cyprinodontidae
- Genus: Aphanius
- Scientific name: Aphanius fasciatus
- Order: Cyprinodontiformes
Habitat
FishBase and Wikipedia describe a wide Mediterranean range spanning southern Europe (France, Italy, Slovenia, Croatia, Albania, Greece, Montenegro), Turkey and North Africa from Egypt westward. It is a non-migratory fish of coastal lagoons, salt marshes, river mouths, ditches and swamps, tolerating fresh, brackish and hypersaline water.
Tank requirements
- Minimum tank volume: 60 L
- Temperature: 14-26 °C (57-79 °F)
- pH: 7.5-8.5
- GH: 15-30 °dGH
- Lifespan: 2-4 years
- Setup: brackish, well-planted tank; Seriously Fish suggests 1-3 g/L marine salt
Diet
An omnivore. FishBase records feeding on invertebrates and plants; Wikipedia lists small crustaceans, plankton, insects and larvae, plus plant matter, algae and detritus. Seriously Fish describes it as a micropredator that accepts dried foods but benefits from regular live or frozen Artemia, Daphnia or bloodworm, especially when breeding.
Compatibility
Seriously Fish notes that males defend territories and that the species is unsuitable for general community aquaria. It is best kept in groups with a surplus of females (around two to three per male) so aggression is spread out.
Breeding
It is a fractional (continuous) spawner that produces eggs from April to September (Seriously Fish, Wikipedia). Eggs attach to algae or plants by filaments and hatch in about 10-15 days; fry accept Artemia nauplii once free-swimming, and fish mature within their first year.
Conservation status
IUCN Red List: Least Concern, assessed 2022 (per FishBase). FishBase notes the species faces pressure from habitat destruction and introduced species.
Aphanius fasciatus Breeding Guide
Overview
Aphanius fasciatus, the Mediterranean killifish (family Aphaniidae), ranges across the Mediterranean basin from Europe (France, Italy, the Balkans, Greece, Turkey) to North Africa, where FishBase and Wikipedia report it from coastal lagoons and hypersaline to fresh, still or slow-flowing waters. It tolerates salt, brackish and fresh water and the IUCN lists it as Least Concern (2022).
Sexing
Wikipedia notes males reach about 5.5 cm and females up to 6 cm, with males showing 10-15 broad dark transverse bands on olive-green-bluish flanks and females more subtly coloured with indistinct narrow bands.
Conditioning
Maturity is reached by the end of the first year (Wikipedia). The species suits cooler water; FishBase lists 10-24 C (optimum near 18.9 C), pH 6.5-7.5 and 8-10 dH. Condition adults on small live and frozen foods in slightly brackish hard water.
Breeding Setup
A cool, slightly brackish biotope tank with a sandy bottom and submerged vegetation provides the spawning sites this species uses. Fine-leaved plants and algae give the females places to attach eggs.
Spawning Behaviour & Trigger
Spawning is seasonal, running from April to September (FishBase). FishBase notes spawning takes place on the bottom and in submerged vegetation, and Wikipedia adds that females lay their eggs on the bottom, preferably on aquatic plants and algae.
Egg & Fry Care
Wikipedia gives incubation of 10-15 days until hatching. Eggs can be left on the substrate and plants in a low-predation tank or moved for separate incubation; free-swimming fry take small live foods.
Common Challenges
FishBase notes the species can be difficult to maintain. Cool, stable, slightly brackish hard water and protection of eggs and fry from adult predation are the main keys to consistent fry production.