The way ichthyosaurs breathe is
It is a large marine reptile similar to fish and dolphins. They lived for most of the Mesozoic era and first appeared about 250 million years ago, a little earlier than dinosaurs. They disappeared about 90 million years ago, about 25 million years before the extinction of dinosaurs. Some ichthyosaurs are very small, but others are very big.
In the Middle Triassic, the hitherto unconfirmed terrestrial reptiles gradually returned to the ocean and evolved into ichthyosaurs, similar to the evolution of dolphins and whales. They were particularly common in Jurassic, and they were replaced by plesiosaurs as the tallest aquatic carnivore in Cretaceous.
Life habits of ichthyosaurs
The specimen of ichthyosaur not only proves that ichthyosaur gave birth to a live baby, but also further proves that, like whales and dolphins, Xiaoyulong came out as Mr. Tail. However, it is very important to note that individuals who are saving production may not be producing when they die.
On the contrary, it is very likely that they died during pregnancy, but later in the process of decomposition, the baby was pushed out of the birth canal by the gas produced in the mother's body. This kind of post-mortem birth is very common among whales rushing to the beach today. Every year in mid-June, pregnant female ichthyosaurs will swim in droves to the land surface with large coral reefs and seaweed, and give birth as soon as possible. This environment not only provides a rich food source for the small fish dragons, but also provides them with shelter.
Refer to the above content: Baidu Encyclopedia-Fish Dragon