First, the name of the blue starfish The blue starfish is known as Trichogaster tricho pterus, and Taiwan is known as the silk fin, which is part of the Anaban tidae family. It is native to Malaysia in Southeast Asia, Sumatra in Indonesia, Thailand, South Vietnam and India in South Asia. The fins of the fish have been reduced to filaments and are also known as silkworms. There are three extremely bright black round spots on the side of the body, one behind the lid, one in the center of the body, and one on the base of the tail shank. The fish body is decorated very pretty. The three round spots are like three black stars embedded in the blue sky and are therefore praised as "Samsung Fish" or "Blue Samsung." In 1896, it was first described by the German JFUmlauff, whose English name was Blue gourami (Blue Lagame) or Three spot gourami (Samsung Glamame). In Southeast Asia, aquarium fish growers are known as "Blue sampans" (since its shape is similar to that of "common bream," but the colors are different). Other Chinese names include Wan Long Fish, Lan Man Long, and Black Spotted Line-finned Fish. Blue Starfish can be divided into two types based on body color: one is more purple and the other is blue. Dr. Lodiges found that species from Sumatra did not have dark spots on the side of the body, so the fish was also known as Trichogaster trichopterus sumatranus (blue-footed pelicans, blue-ray finfish). Second, the morphological features of the oval-shaped body, side flat, head medium and large, large eyes, located in the cephalic center, chest and abdomen to the end of the caudal stalk was long curved. The pelvic position of the pelvic fins has degenerated into the tail of the eddy, which acts as a tactile organ. Adult fish is about 10 to 15 cm long. Its whole body is blue-gray and its abdomen is light yellow. The body emits colorful violet under the illumination of low light. There are three black spots on the side of the body. The dorsal, anal and caudal fins are gray. Each fin has white pearls. spot. The dorsal fins are short and tall, slightly yellow, and they float like a small flag when they unfold. The anal fins are long, extending from the chest to the base of the caudal fins. They are pale yellow and have bright orange-red broadsides. The skirts that resemble soft when swimming move in the wind. Tail fin shallow fork, light yellow and transparent base color. The lid glitters brilliantly in blue. Third, the ecological habits 1, the requirements of dissolved oxygen Blue Starfish and Lily fish, pearl fish like pleated auxiliary respiratory organs, located above the iliac cavity, composed of mucosal complex folds, can be in the oxygen content Less water lives, and when the body of water is oxygen-deficient, it can float to the surface to swallow the air, so they do not worry about lack of oxygen in the water. 2. Temperature requirements This fish prefers to inhabit natural waters that are not very mobile or completely stationary. There is no special requirement for water quality. The required water temperature is relatively high, but its ability to withstand low temperatures is strong. Occasionally, it also survives at low temperatures (14°C). The lethal minimum temperature is 11.5°C. The most suitable water temperature for breeding this fish is 23～26°C. 3, eating habits are omnivorous fish, can accept cockroaches, wireworm, water fleas, leeches and other live bait; also eat artificial bait, and even eat live fry, even shrimp and crab grain feed, but not Chasing swallowed fish. However, Blue Starfish is still the favorite fodder floating on the water. 4, feeding the blue star fish larger body, and love quiet, so the breeding aquarium should be larger, while the best planting some plants in the box, such as the same time can be used to build beautiful rockery rockery, both for the blue star fish Hidden, it can also cause the "landscape fish" role. Blue Starfish are adaptable and have a mild temperament and often swim regularly to the surface. Because they often bully fish whose body size is smaller than their own, they cannot be mixed with individual small fish like the Lotus Lantern, traffic lights, green lotus lights, etc. in the same aquarium, but they can be of the same size as other species in the tropics. Ornamental fish polyculture. Four, male and female identification Bluestar fish before sexual maturity, male and female characteristics are not obvious, the sex is more difficult to distinguish, and can be compared by careful observation: (1) body color: male fish color is brighter, while the female is relatively bleak; (2) Dorsal and pelvic fins: Male dorsal fins are relatively large, dorsal fins and anal fins are pointed at the back end, while females have relatively small dorsal fins, and dorsal fins and anal fins are relatively rounded at the posterior end; (3) abdomen: males are not full on the abdomen, The female abdomen is fuller; (4) Filamentary pectoral fins: The male silk filiform pectoral fins are clearly orange-red, while the female filiform pectoral fin bases are not distinctly orange-red. When frightened, the male and female fish will show irregularly inclined stripes. 5. Breeding Preparation 1. Broodstock Selection Blue Starfish can reach sexual maturity after 6 to 7 months of growth. The best choice is 10 cm in length. Around the age of 12 to 20 months of age, the fish used to make broodstock, so when it was the most fertile (fish with too large age is not ideal). At the same time, to pick a healthy, disease-free, bright-coloured body, the male must be larger than the female, and the female must be an individual whose abdomen is significantly enlarged, otherwise the breeding may not be successful. 2, breeding aquarium breeding aquarium to large, specifications can be 503,535 cm; water temperature slightly higher than usual 1 ~ 2 °C, with 26 ~ 28 °C is appropriate, the pH value of water is 6.8 ~ 7.2, the hardness of water is 120 ~ 150ppm. Breeding does not require aeration and oxygenation. It is most important to keep the environment quiet. It is even more difficult to use filtration equipment. The rest of the arrangement and conditions are the same as those of fish farming aquariums. After careful selection of the broodstock, the males and males were put into the breeding box at a ratio of 1:1. After living for a period of time, they began to prepare for spawning and breeding. The male fish had nesting behavior. 3. When the estrus and nesting males find a suitable place in the breeding aquarium, they begin to float to the surface, swallow the air, and build a floating foam fish nest. Since Blue Starfish have the habit of building a foam nest prior to spawning, it is best to place some floating large-leaved aquatic plants on the water, and it is also possible to place a plastic foam plate to make nesting easier. Its built bubble nests are relatively large and loose (a diameter of 5 to 15 cm). Looseness is due to their nests that often contain no clumps or broken leaves. In the male nesting process, the females are generally still at rest but do not swim near the foam nests at times, seemingly encouraging. Six, breeding and nursery 1, mating and maternity nesting is completed, the male fish began chasing females. At this time, the body color of the broodstock, especially the male fish, changes rapidly and often changes from bright blue to dark green in a matter of seconds. If you are disturbed by humans, you will immediately return to the normal blue tone. The male fish will gnaw at this time, wooing the females with various dancing postures, tempting the females to enter the foam nest and jointly performing the production work. The males bend the body and embrace the female fish. The male and female fish are all bent into a “C†shape. The fish touched the female abdomen with a head, and after a few intense hugs and tumbling in both pairs, the females were excited and the eggs were discharged into the floating nest. The males then ejaculated and fertilized the eggs. The fertilized egg is white and transparent, and the particles are suspended in the foam fish nest. The male and female fish are repeatedly tumbled and spawned repeatedly (7 to 10 times) for a duration of about 1 to 2 hours before the female can empty all eggs. Blue Star is a larger tropical ornamental fish, and it is a prolific fish. It has a large number of spawning eggs. Females can produce 800 to 1200 eggs each time. Therefore, they are not very valuable in fish. . 2. After the spawning females are spawned, they will be free to nest and hide in the breeding box. Resting in stealth places, they do not like swimming. Male fish have the habit of taking care of hatching eggs, allowing them to stay in breeding aquariums to protect their nests and protect their eggs. Occasionally, fertilized eggs fall from the nest, and the male catches it cautiously and spits it back to the nest. The female fish swims near the fish's nest in such a time, and the male fish also drives away. The female is not allowed to approach the buoyancy nest and will bite the female fish and even bite the female bite. Therefore, once spawning is completed, the female fish must be fished out again. 3. The next day after egg laying, the eyes of the fertilized eggs appear. On the third day, the larvae are hatched. The larvae newly hatched are crystal-colored. The swimming organs have not yet fully developed and have no free swimming ability. They can only be attached to the foam nests. The yolk sac with oil globules remains in the body. The oil ball disappeared on the fourth day and the larvae moved on the fifth day. Since the larvae of blue star fish are only 0.4 cm, which is significantly smaller than other tropical fish (0.7 cm), it is best to eat larvae first to feed drowning water, and to feed ciliates and egg yolks in the first week, and to provide ciliates and annuals in the second week. Young larvae and young otters. If there are too many larvae, they can be reared in boxes. 4, during the daily management of larvae, due to the incomplete development of the blue star fish, or due to the high density of individuals in the cultivation of water, prone to hypoxia, this time can be slightly inflated. Within one week after the disappearance of the oil ball, which starts in the downstream of the water surface, no water is generally added and no water is changed; a small amount of water is added after one week. When larvae are 12 to 17 days old, special care must be taken to keep them alive. At this time, the larval-associated breathing apparatus is beginning to grow. If it encounters an assault on cold water on the water, it will suffer from pneumonia and die. In short, at this time, the mortality rate of small fish is very high, but in this species of fish, the fish of the blue star fish is very robust, and it is a tropical ornamental fish that can be easily reared. The blue star fish is a species of egg fish. As a species of ornamental fish, its variants are called Cosby gourami (blue rayfish, blue arowana), and its biological characteristics have been relatively stable. The fish is similar except that the whole body is scattered with marbled light blue markings. There are no round dark spots on the body side. There are only some irregular dark markings, often appearing from the back of the pectoral fin to the caudal peduncle, but the latter two rounds. Black spots are more obvious. Under the reproduction of intensive methods, the dark spots on the blue star fish body will gradually fade or be invisible.
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