Chủ Nhật, 9 tháng 1, 2011

Danios

Danios and razors are some of the most popular of the small, gentle community fishes and perhaps the least aggressive of all aquarium fishes. They are easy to maintain, although not very robust. Most remain towards the upper layer of the water and so complement fishes that frequent the lower waters, such as catfishes and loathes. Providing they are fed small, frequent meals and are not housed with larger aggressive fish, they remain trouble-free and are excellent for beginners.

The harlequin fish, or harlequin Astoria, (Ashore) is a small, peaceful fish, often seen in tropical aquariums.It is quite deep towards the front of the body around the belly, but tapers to a very narrow tail. All the fins are clear and the body has a lovely pinkish-blue hue. The rear half of the body is distinguished by a black marking that follows the body shape.hese beautiful little community fish only grow to about 4cm(1.6in) and do best when kept in a shoal. They make good tank mates for Danios anniversaries and thrive in the same conditions. Harlequins eat flake, live or freeze-dried foods, such as Daphnia or brine shrimp. They do not spawn as readily as Danios and will need soft acidic water in the aquarium for breeding to be successful.

The pearl anion (Brachycranic) from the dark, muddy rivers of Burma and Indo-China is superb beginner's fish. These lovely little fishes are quite hardy for their size - only 5cm(2in) - and very active.The body is very long and slim, all the fins are clear and the fish feeds from the surface with its small,upturned mouth. Towards the back half of the body are two or three pink lines that run horizontally over pastel blue scales to produce a pearl effect,hence the common name. This species also has a golden form. Males are usually more brightly colored not as plump as females. Preordains prefix to live in shoals. In the wild, they have a great many predators and if attacked they all disperse in different directions to create confusion and avoid being eaten. The water temperature should he about 24°C(75°F) and the tank should be brightly lit and well planted. Although pearl diagnostician from soft water areas, the yare one of the few cyprinids that will spawn in hard water. Set up a tank with a hunch of plants at one end and feed the prospective pair 'yell for few days before placing them in the breeding aquarium and raising the temperature slowly to 26°C(79°F).The spawning should take place during the next morning, particularly if the tank receives some direct sunlight. The pair chase through the plants, where the eggs are released and fertilized. Once the spawning is over, remove the parents or they will eat the eggs. The eggs hatch sometime the following day, depending on the temperature, and the fry will he free-swimming 4-5 days later. Feed them on a liquid fry food at this time.
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