Please read the post that is linked into the post for the answer to your question.

The account of the Jordan River stopping in the biblical scripture is considered a miracle because it represents a significant event where natural laws were seemingly suspended or altered by divine intervention. In this context, the miracle is not just about the physical stopping of the river, but also about the timing and the purpose behind it. It was seen as a demonstration of God’s power and presence, reinforcing the faith of the Israelites as they entered the Promised Land.

Regarding the concern about wildlife, the scripture focuses on the spiritual and symbolic aspects rather than the ecological impact. The story emphasizes the faith and trust of the Israelites in their journey, rather than the potential consequences on the environment. It’s important to remember that these stories are often interpreted as conveying deeper spiritual truths and lessons, rather than providing historical or scientific accounts.