Excuse me, how is Underwater World filmed at night?

Just right. It was all taken by the photographer himself.

Underwater shooting has a professional waterproof camera. The photographer wore a diving suit and took a waterproof camera to shoot in the sea. If you are deep in the seabed, the camera must be pressure-resistant, because the water pressure on the seabed is quite high. Moreover, due to the limited oxygen content in the diving suit, it is often necessary to shoot video clips in the sea many times to complete the production.

Similarly, shooting in the tropical rain forest is also shot by a special person. There are many ways, such as taking a helicopter or hanging from a high branch with a seat belt. It's easier to shoot by helicopter, but the angle hanging on the branches is single, so if you want to shoot a piece similar to the bottom of the sea, you need to shoot several times and choose different places.

The reason why the photographer takes pictures in person is because the shooting angle is very important. Photographers go in person and observe the best shooting angle on the spot before they can start shooting. Just like an action in a movie needs to be shot many times and then the best is chosen, and the pursuit is the beauty of the picture.