The turtles that can live in deep-water environment are deep-water turtles, such as pig-nosed turtles, razor turtles, musk turtles, crocodile turtles, map turtles and so on. Deep-water turtles are not a specific classification, including many species and widely distributed areas. These turtles can be raised in fish tanks, because they have strong swimming ability and are especially good at holding their breath, so it doesn't matter if they stay in the water all the time. In addition, deep-water turtles generally don't need much sunshine.

1. Pig-nosed turtles: Pig-nosed turtles are highly aquatic turtles, which are very good at swimming and only go ashore when laying eggs. It prefers warm climate and is afraid of cold. The water temperature for breeding should be kept at about 26-28 ℃. It should be noted that this turtle is naturally fond of fighting, so it must not be mixed.

2. Crocodile turtle: Crocodile turtle is a very fierce turtle. It is native to North America and mainly lives in water there. Except for breeding, it hardly goes ashore at other times. Its own water quality is very good, so it can also be raised in deep water. However, it is not very kind, so it must be careful when raising to avoid being bitten.

3. Razor Turtle: Razor Turtle is also a typical deep-water turtle, which does not need to bask in its back frequently, so the water level can be higher. However, in the period of young turtles, do not use deep water to raise them, and it is best to provide a landing site in the container, so that they can go ashore without wasting their physical strength by swimming all the time.