Aquarium fish: Marbled hatchetfish (Carnegiella strigata)
Size: 3.5 – 5 cm
Origin: South America
Water temperature: 24-28 ° C
Aquarium volume: 54 l
Marbled hatchetfish (Carnegiella strigata ) – an interesting looking freshwater aquarium fish from the trout family.
South America . The species is widespread, it is found in the lower, middle and upper Amazon basins and the Caqueta River in Colombia. It lives in acidic “black water” environments – streams, watercourses and flooded forest areas.
Characteristics and disposition
Under natural conditions it reaches 3.5 cm, in an aquarium it can grow up to 5 cm in length.
It is characterized by a small but tall, crooked body shape. Coloration adapted to life in Amazon rivers, which, together with the behavior, is supposed to make the fish look like a dead leaf floating on the water surface. The body is usually white or cream with a dark marble pattern. A golden line runs from the eye to the base of the tail. The reflection of light from the surface of the body in the water mirror is supposed to resemble the structure of a leaf.
In addition, the fish move only slightly, usually they remain motionless, only carried by the current of the water. Such camouflage protects them from potential predators. Gender difficult to distinguish. Probably females grow larger and rounder. Pstrążenice are calm and peaceful.
They may be shy at first when introduced to an aquarium, but gain confidence over time. They feel best in a larger group. It is recommended to keep a minimum of 6 in the aquarium. Most of them are bolder, look nicer and display more interesting behavior. They prefer to stay in the upper parts of the reservoir, right next to the water surface.
Nutrition and feeding
Omnivorous fish. The mouth is adapted to take food from the water surface. They will not eat food that sinks to the bottom. In nature, they feed on flies and mosquito larvae. In the aquarium, you should give food that will stay on the water surface for as long as possible, e.g.
flakes. However, they may not survive on dry food alone, so it is worth feeding them daily, e.g. with black mosquito larvae, fruit flies, bloodworm, daphnia or artemia.
For a small flock of marbled trout, a minimum of 54 liters of aquarium is recommended, with a dark substrate, necessarily with a large number of floating plants, between which the fish will spend most of their time. To decorate the tank, you can use roots or dry leaves that give off tannins into the water.
The movement of the water should not be too strong. Frightened, they can jump out of the aquarium, therefore a cover is required. They prefer acidic and soft water, filtered through peat. A very mild species, but due to its small size and temperament, it is not recommended for a social aquarium. They can only be kept with similarly sized calm bites, cuirs , armors .
They are often found in addition to stocking with bottom Apistogramma cichlids or other small cichlids.
The reproduction of marbled trout is difficult, but possible in aquarium conditions. It is recommended to breed in a group of 4-6 adults in a species aquarium with mature, acidic water at a temperature of 25-26 ° C and pH 5.5-6.5. It is helpful to filter the water through the peat. A lot of floating vegetation should be found in the reservoir.
The water current should be moderate and the light not too bright. Feed the fish more often with live and frozen foods a few weeks before spawning is planned. Roe is scattered among the vegetation or directly on the ground. After spawning, the parents must be separated because they eat both the eggs and the fry. At a temperature of 25 ° C, hatching takes place after 36 hours.
The larvae begin to swim on their own after the next 2-3 days. For the first 2 weeks, we feed the fry with micro foods. After this time, they will be large enough to accept brine shrimp larvae.