Danding Koi (Confirmed Introduction)
The body of the carp is bright and clean, but there is a bright red pattern in the middle of the head. Because the shape of the red-top koi is very special, it has the reputation of "good luck at the head". Feng Shui red-topped koi is the main occupation, so aquarists who raise Feng Shui fish must also pay attention to some Feng Shui principles.
1. The number of teeth is very small, arranged in one to three rows on the lower pharyngeal bone.
2. There is only a pair of bones around the mouth close to the lower jaw, and there is no adipose fin.
3. Have two pairs of beards.
Internal organs: There are two pairs of beards on the side of the mouth, and their skin contains sensory cells similar to taste buds, which can distinguish taste and search for food in the mud; there are no teeth on the edge of the mouth, but there are developed throat teeth. , might as well taste the food. There are five pairs of gill arcs on the back of the tongue. The outermost gill arc is the so-called gill, which can filter plankton from the water. The four pairs of red gill flaps in front of the gill arcs have gas connection functions. The gill flaps are filled with numerous capillaries, and the back of the tongue is connected to the esophagus. Without the stomach, the esophagus is straight through the intestines, its length is about 5 times the body length and curves in the abdominal cavity. The part close to the esophagus is slightly thicker and contains digestive juice infiltration glands similar to gastric glands. There is a liver, pancreas and a dark green gallbladder.
The fat is located at the back of the body cavity and is divided into two chambers, the front and back, which are combined with the inner ear through a small bone. The heart is wrapped in the cardiac sac and is composed of the atrium and the ventricle. There is also an arterial bulb. . There is a total elimination hole at the front end of the anal fin base, which connects the rectum, urethra and gonads. Sperm or eggs are produced in the nest.
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