The Alien Beasts in the Book of Mountains and Seas are recorded in Jiutian, Demon God, Bahuang, Shenguang, and Four Seas. Each alien beast has its own unique characteristics and abilities, and they are all good.

1. Jiutian: Jiutian is the tallest beast in the Classic of Mountains and Seas. It has the ability to control weather and space, and can summon thunder, lightning and rainbows. Jiutian also has extremely strong defense and attack power, and is an extremely powerful beast.

2. Demon God: Demon God is a dark alien beast with the special ability to absorb human life and abilities. In battle, the Demon God can release dark energy, causing great damage to enemies.

3. Bahuang: Bahuang is a mysterious beast with the ability to travel through space and time. In battle, Bahuang can travel through different scenes and time and space, find the opponent's weaknesses and double his attacks.

4. Divine light: Divine light beasts have powerful healing and auxiliary abilities. It can provide continuous recovery effects for teammates during battle, enhancing the combat effectiveness of the entire team.

5. Sihai: Sihai is a strange beast of the ocean, possessing special abilities with water attributes. In battle, Sihai can use water attribute abilities to restrain the attacks of other beasts, and at the same time, it can also provide the team with more defense and auxiliary effects. To sum up, each alien beast has its own unique advantages. So it's all good.