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Are killer whales mammals, viviparous animals

Although Orcas live in water, they are not fish, but mammals. Some of their habits are different from fish, but the same as most mammals. For example, they need to breathe with their lungs, which is very different from the way fish breathe with their gills. This breathing method is more efficient. In addition, killer whales are also viviparous, which is very different from the way most fish lay eggs. Moreover, killer whales have lactation after birth, so they are mammals. 1、 Are killer whales mammals? Although killer whales live in water, they are not fish, and their habits are very different from fish. Killer whale is a kind of whale, belonging to mammalia and an aquatic mammal. Killer whales have some very prominent characteristics, which are consistent with all mammals. For example, killer whales need to breathe with their lungs, not with the help of fish gills like fish. The efficiency of breathing with their lungs is relatively high. In addition, the reproductive mode of killer whales is viviparous, which is very different from that of fish eggs. After giving birth to the baby tiger whale, it will go through a period of lactation, which is also a prominent feature of the tiger whale as a mammal. 2、 Is the killer whale a viviparous animal? As mentioned above, the killer whale belongs to mammals and viviparous animals. Unlike the way fish lay eggs, killer whales produce small whales directly. Female killer whales give birth about every 3-5 years. After the female killer whale is pregnant, the pregnancy period is about a year. Generally speaking, female killer whales can only produce the same baby tiger whale at a time. After birth, it is the process of lactation, and the lactation period will be about one year. During lactation, killer whales grow very fast. Even within the first 24 hours of breastfeeding, they can gain a lot of weight. (HuJingShiBuRuDongWuMa,ShiTaiShengDongWuMa)