At night, the giant salamander stands quietly in the stone pile at the mouth of the beach. Once it finds its prey passing by, it will launch a surprise attack. Because the teeth in its mouth are sharp and dense, it is difficult for prey to escape after entering its mouth. Have a strong hunger tolerance, keep in cold water for two or three years without eating and will not starve to death. At the same time, you can also overeat. A full meal can increase your weight by one fifth.
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When food is scarce, giant salamanders will devour each other and even feed on eggs. I usually hide, and I like to make my body the same color as the surrounding stones to avoid natural enemies. There are obvious individual differences and seasonal changes in food intake and frequency, which should be adjusted according to different individuals. Each feeding amount is equivalent to 2-4% of the weight of giant salamander, once every 4-7 days in winter, once every 3-5 days in spring, once every 2-3 days in summer and once every 2-5 days in autumn.
Water temperature is an important factor affecting the feeding of giant salamander, because giant salamander is a temperature-changing animal. With the change of water temperature, the physiological metabolism of the body changes. Generally, the food intake grows above 12℃, and the food intake at 18 ~ 23℃ is the largest and fastest. When the water temperature rises above 26℃, the food intake decreases.
References:
Baidu encyclopedia-baby fish