C442 Find the Source

Ye Feng asked curiously, "Look, these two eating snakes look exactly the same as the other fish, but why are they black?"

"Could it be that their gender is different?"

Hua Yushan said. In nature, many animals had this phenomenon. Female and male had a huge difference in body color.

Lau Qingzhu also squatted down to take a look. She shook her head and said, "I grew up by the sea too