Tetra Fish Stock Photos & Tetra Fish Stock Images - Alamy

Cardinal Tetras are very active swimmers and need an aquarium that is at least 15 gallons or larger. Ideally, they should be kept in a tank that is at least 20 inches long to give them plenty of swimming space. This is a blackwater fish, so the aquarium should be dimly illuminated and the water needs to be very soft. Hard water can be problematic, building up calcium salts in their kidney tubulli. Additionally, keep the tank very clean as they will not tolerate poor water quality.A dark substrate and some dense plant cover combined with free swimming space will display this fish optimally. Lighting should always be dim as this fish will not show good coloration in brightly lit tanks. Additionally, the tank should be securely covered as these fish can jump and may do so if given the opportunity.A biotype setup is the best choice for this tetra and is very easy to put together. The substrate should be made up of river sand with some driftwood branches and twisted roots. Their natural habitat does not have many plants so no need to add them. Some dried leaves can be added to stain the water for a natural effect. Leaves should be removed and replaced every few weeks. To simulate the blackwaters they come from, add a mesh bag of aquarium-safe peat to the filter.

Fertile lemon tetra take approximately 72 hours to hatch at 28 °C. The fry spend a further 24 to 48 hours absorbing the yolk sac, whereupon they become free-swimming. At this stage, the fry should be fed with infusoria or a special egglayer fry food, and frequent partial water changes (around 10% of the aquarium volume every 24 to 48 hours) initiated. After 7 days, the fry should be ready to feed upon newly hatched Brine Shrimp. The fry appear to be almost transparent at first, with the exception of the eyes, and do not begin to develop the 'lozenge' shape of the adult body until the differentiation of the finfold into the unpaired fins is complete (around 4–6 weeks). Once this process is complete, the fishes are ready to take sifted . Maintenance temperature for the fry should be carefully and slowly reduced to around 25 °C once the fishes are thus recognisably miniature versions of the adults. The first signs of black colouration on the unpaired fins may take a further two weeks of more to being manifesting themselves, and it will not be until the fishes are at least 12 weeks old that they will fully represent miniature versions of the parents. Even at this stage, the black colouration of the unpaired fins will be incompletely developed, and it will not be until sexual maturity is achieved (approximately 8 to 9 months after hatching) that the black border on the anal fin will become a reliable gender differentiation characteristic.

Xray Tetra Tropical Fish Royalty Free Stock Images - Image: 1621259

Penguin Fish Tetra, thayeria boehlkei - Stock Image Penguin Fish Tetra .. Black Neon Tetras typically spawn in the morning, and each female can produce several hundred eggs. The females will deposit tiny, clear, slightly adhesive (sticky) eggs among the fine-leaved plants. The eggs will hatch in approximately 22 to 26 hours, and the fry will appear 3 to 4 days later. The fry are very small, which makes them rather difficult to rear. For the first few days, feed the fry infusoria-type foods until they can feed on microworm or brine shrimp nauplii. Baby fish should to be kept isolated until they are too large to be eaten. See for a general description of breeding processes, and see for information about types of foods for raising the young.

Tetra Fishes Stock Photos & Tetra Fishes Stock Images - Alamy

The Black Neon Tetra has been successfully bred in captivity. In fact, available Black Neon Tetras are now generally all captive-bred, and an albino form is also sometimes available. These fish are egg layers and freely spawn in schools or in pairs, but unless breeding pairs are isolated, the eggs and fry will almost certainly be eaten. Keep breeders in a separate tank to get the best number of fry.A 10-gallon spawning tank is adequate. Black Neon Tetras require softer and more acidic water to spawn. Failing to breed, in most cases, is due to unsuitable water conditions. The water should be slightly acidic with a pH of 6.0 and a hardness of 4° dGH or less. Fine-textured, live plants can be provided for a spawning medium, and floating plants will help keep the tank dim. A layer of mesh works, too, but make sure it is wide enough to let eggs to pass through but small enough to keep the parents out. Start out the breeding pair in a dark tank then gradually increase the amount of light until spawning occurs. The eggs seem to be light sensitive, so keep the tank dimmed after the spawn. A small, air-powered sponge filter is needed for filtration and will provide a gentle water flow. Filtering the water through aquarium-safe peat will also encourage these fish to spawn.To optimize breeding success, condition the males and females by feeding them plenty of small, live foods. Select a breeding pair or small group and transfer them to the breeding tank. A mature female's belly will become nicely rounded when she is full of eggs. Choose males that are the most colorful. A breeding group should include 1 or 2 males with several females. While conditioning the breeders, keep the spawning tank at 75° F (24° C). After a few days, slowly elevate the temperature to about 80° F (26.7° C).Black Neon Tetras typically spawn in the morning, and each female can produce several hundred eggs. The females will deposit tiny, clear, slightly adhesive (sticky) eggs among the fine-leaved plants. The eggs will hatch in approximately 22 to 26 hours, and the fry will appear 3 to 4 days later. The fry are very small, which makes them rather difficult to rear. For the first few days, feed the fry infusoria-type foods until they can feed on microworm or brine shrimp nauplii. Baby fish should to be kept isolated until they are too large to be eaten. See for a general description of breeding processes, and see for information about types of foods for raising the young.

Neon Tetra Fish Stock Photos and Images - Alamy