Ryukyu New Rice Shrimp, decapod of the Arthropoda of the Animal Kingdom, is called Ryukyu New Rice Shrimp because it originated in Taiwan. It is currently distributed in Taiwan and Zhejiang. It is about two centimeters long and is large oval. They live in mountain streams with very clear water, and are mostly hidden under fallen leaves. The most suitable water temperature for growth and development is about 22-28 ℃, and the pH value of the water body is about 6.5-7.5. The difficulty of raising is not very high. However, it also needs to be taken care of. Just do it. The lifespan is about 2 years. In the diet, it mainly eats vegetables, aquatic plants, small fish shrimps, and the artificial feed eats more omnivorous animal fish, insects and red worms. Because ornamental shrimp has the characteristics of beautiful appearance and easy reproduction, it has developed into a popular pet, showing a new fashion trend in China.

1. Appearance characteristics of Ryukyu new rice shrimp

The frontal horn is short, extending only to the end of the first segment of the first antenna stalk. The middle of the 2nd segment; the upper margin has 3-8 teeth, all located on the frontal angle, and the carapace on the posterior margin of the orbit has no teeth; the lower margin has 0-3 (usually 1-2) teeth. The buccal spines on the anterior corner of the carapace are degenerated or have a small spine or are more developed, but the latter is more common. There are 6 pairs of movable spines on the back of the caudal segment, the ends are arc-shaped, with a small triangular short spine in the center of the back, and 4 pairs of spines at the end edge. Lateral spines are noticeably thick. The thickness and size of the three pairs of spines are nearly similar. The end of the preanal ridge is blunt and round, without spines, and the end has a setae plexus. The first tentacle spine extends to or slightly beyond the eye, the first section is 2.1 times as long as the second section, and the second section is the same length as the third section. The second tentacle scales are about 3.2 times as long as they are wide. The outer distal corner of the inner limb of the 1st maxillopod has a short rounded process. The third maxillopodia has a small half beyond the end of the first antenna peduncle; the distal segment is slightly shorter than the last two segments, the lengths of the last two segments and the last three segments are about the same, the terminal ventral margin of the distal segment has multiple active spines, and the terminal is claw-shaped; The outer limbs extend to about the middle of the last 2 segments.

2. Habit characteristics of Ryukyu New Rice Shrimp

Ryukyu New Rice Shrimp belong to the middle and pelagic shrimps, they are very firm, they like to swim very much, they can swim and swim. Good skill, and easy to jump the cylinder. But in fact, Ryukyu new rice shrimp are very timid, they will not take the initiative to approach other creatures, and often hide themselves, and they will be relatively active at night. So although they don't like to eat grass, in many aquariums with Ryukyu new rice shrimp, you can still see lush aquatic plants in them.

3. Main points of raising Ryukyu new rice shrimp

1. Water quality

The hatched seedlings reach During the planktonic period of metamorphosis into juveniles, it is probably best to mix 30% seawater. After becoming juveniles, they can be moved into pure fresh water for breeding. Freshwater-mixed with 10% seawater-mixed with 30%seawater-mixed with 50%seawater-and other four concentrations of water tank, moved into the juveniles and raised for one month, the results were pure freshwater without salt, better than the other three . This should be a natural result from the habit of living in the area where the salt is thinner, the faster it grows, that is, when it metamorphoses from nature to juveniles, that is, it moves upstream along the river from the mixed seawater area to the pure freshwater area.

2. Daily

The temperature regulator is the same as for tropical fish when raising in the tank. Water thermometer and air pump, the size of the water tank should be more than 60 cm, and attention should be paid to the supply of water temperature and oxygen. The water temperature should be above Celsius, and the pH value should be 6.5 to 7.5 degrees. Ryukyu new rice shrimp are omnivorous and are not very picky eaters. The algae attached to the stream and the dead leaves drifting down can be their main food. At the same time, some animals or the corpses of the same kind will also become their delicacies. In normal feeding, you can directly use shrimp food, or vegetable leaves, beans, and red worms. The color of its body will also change according to the surrounding environment and changes in feeding. Generally, there are six colors such as red, white, yellow, green, blue, and cyan.

3. Propagation

Green water should be cultivated in advance, but not too early, because the green algae will die in large numbers after the green water bursts to the greenest. Do not use the green water at this time. After the green water is cultivated, half of it should be poured out and replaced with tap water every day. At the same time, put a fish that can defecate in it. Half of the green water, half of the old water of the fish tank, the water level should not be too high, 2 cm is enough. Inject 40ml of green water into it every day, and draw out 40ml of water at the same time to maintain the water level. After two or three days, if the young shrimp are found to be dead, add some spirulina powder in an appropriate amount, and do not add if there is no death, so as not to spoil the water quality. Never put oxygen directly in the tank. Because the juvenile shrimp are afraid of tossing, and pumping up causes the water to churn everywhere. Maintaining a low temperature, 26 degrees Celsius is more suitable, low temperature increases the amount of dissolved oxygen, and can also inhibit the deterioration of water quality. The fertilized eggs are ovulated in about 20 days at a water temperature of 27-28 °C); the released eggs hatch into nauplii in about 13 hours at a water temperature of 27-29 °C; the nauplii are metamorphosed into the Daphnia stage after 6 times of peeling. Larvae (Daphnia stage Zoea stage); hatched Zoea becomes mys shrimp stage after 3 to 4 days of peeling (7 to 8 days after spawning); after about 10 to 11 days, it can metamorphose into late larvae (Post stage).