When viewed from underwater, their white bellies allow them to blend in with the sunlight, making them harder to spot by other creatures.

Gentoo penguins are the fastest swimmers among penguins. The average speed of king penguins is about 8 km/h.

They measure rectal temperature from the anus. We measure rectal temperature from the anus because the rectum is almost always in a closed state, is not easily affected by the outside world, and can maintain a constant body temperature.

They have sensory organs called "taste buds" that allow them to search for food. When they spread their whiskers wide, they are looking for food.

The green anaconda lives in the Amazon River in South America. It is a huge snake that can grow up to 9 meters. Females are larger.