Berliner Highfin Swordtail (Xiphophorus hellerii var.)
| Berliner Highfin Swordtail Xiphophorus hellerii var. | |
|---|---|
 | |
| Name | Berliner Highfin Swordtail |
| Name Lat. | Xiphophorus hellerii var. |
| Family | Livebearers |
| Family lat. | Poeciliidae |
| Order | Killifishes & Livebearers |
| Order lat. | Cyprinodontiformes |
| Origin | Central America (breeding variety) |
| Habitat | Streams, ponds |
| Diet | Omnivore |
| pH | 7.0-8.0 |
| Behavior | Peaceful |
| Keeping | Group |
| Care Level | Easy |
| Reproduction | Livebearer |
| Breeding | Simple |
| Life Span | 3-5 years |
| Protection | No |
| Metric Units | |
| Size | 10-12 cm |
| Temperature | 20-28 °C |
| Hardness | 10-25 °dH |
| Aquarium | ~ 150 l |
| US Units | |
| Size | 4"-4.7" |
| Temperature | 68-82 °F |
| Hardness | 178-445 ppm |
| Aquarium | ~ 40 gal |
Distribution and habitat
The Berlin Highfin Swordtail is a breeding form. The natural range of the swordtails extends from the southern catchment area of the Rio Nautla in southeastern Mexico, through Guatemala and Belize to northwestern Honduras. They live mainly in shallow, flowing or stagnant waters with dense underwater vegetation.
Maintenance
The aquarium should have a varied, partly dense planting, with shelters and hiding places (roots) and provide sufficient swimming space. Slightly shaded light (floating plants) and medium to hard water is ideal.
No ammonia, ammonium and nitrite should be detectable, the nitrate value should not exceed 100 mg/l. To ensure the water quality and oxygen content, a filter and heater adapted to the aquarium size is required, as well as lighting for the species-appropriate day-night rhythm of the animals.
Diet
The food supply consists of dry, frozen and live food. For a balanced diet, feed once a day with a high quality dry food (flakes, granules, pellets) as well as cyclops, daphnia, artemia, mosquito larvae, etc. (live or frozen). In addition, they need plant food, such as algae leaves, algae wavers, over-broiled leafy and wild vegetables or dry food with high plant content.
It is recommended to feed small portions several times a day, which are eaten within a few minutes. A regular and varied diet promotes health and increases resistance.
Behaviour and compatibility
They are swimming, peaceful fish and well suited for a community tank. Harmless quarrels may occur among older males. It is recommended to keep at least 5 swordtails together, whereby the number of females should predominate.
Basically, only compatible fish species with similar demands on water quality and water temperature should be socialized
Sex dimorphism
Males are smaller and have an anal fin (gonopodium) that has been transformed into a mating organ. Sexually mature males bear a "sword" on the lower part of the caudal fin. Females are larger and appear rounder.
Reproduction and breeding
Swordtails are live-bearing fish. Internal fertilization is facilitated by the male's gonopodium. Fertilized females are usually clearly recognizable by a dark colored pregnancy spot on the posterior abdomen. After 4-6 weeks of gestation, up to 120 fry are born. They are already fully developed and independent at birth. After they have filled their swim bladder at the water surface, they can immediately start feeding.
Fry must be fed several times a day with special rearing food (Artemia nauplii). In community tanks breeding is hardly possible, because the fry are easy prey.
Important
Swordtails are bred in many varieties. Mostly they are crosses with Platy (Xiphophorus maculatus) or Parrot Platy (Xiphophorus variatus)
Soft water is not tolerated well and makes them susceptible to disease. The addition of sea salt (mineral salt) from the pet store to harden the water prevents.
The well-being of the fish should be monitored regularly. The temperature should be checked daily, the pH value, hardness and nitrate value at least every 14 days. Regular partial water changes are recommended, even if the pollutant load has not yet reached the upper limit. Sudden changes in water quality should be avoided. Newly introduced fish must be accustomed slowly to the water in the aquarium.
Further literature can be found in your pet store.
References
Text: petdata; Image: petdata
Source: BMEL (1998): Tierschutzgutachten - Haltung von Zierfischen (Süßwasser); RIEHL & BAENSCH (2006): Aquarien Atlas Bd. 1, Mergus Verlag; ENGELMANN (2005): Zootierhaltung - Tiere in menschlicher Obhut: Fische, Verlag Harri Deutsch
- Gemäß § 21 Abs. 5 Tierschutzgesetz idgF