פּירוש אויף שמות 10:19

“Not a single locust remained” [10:19]. All the locusts flew away, even the locusts that the Egyptians had gathered in barrels, in order to eat the locusts, came back to life and flew out to the sea, in the expectation that they should not derive any benefit from the locusts.⁹Exodus Rabbah, 13. 7.

Bahya writes. Moses’ prayer helped forever, from that time onwards. When Moses expelled the locusts from Egypt, no locusts have come into the land of Egypt. Yet, locusts sometimes come to the land of Israel. However, they are never found in the land of Egypt, and if they travel through the land of Egypt to the land of Israel, they do not damage the land of Egypt. Similarly, Moses told the frogs to remain in the water. There remained one large frog in the water. Occasionally, it goes out on to the dry land and it eats three people at one time. Spears and arrows cannot hurt him. He also has a powerful poison within him. Even when one strikes him in the stomach and kills him, yet when a person touches him after his death, the person dies.¹⁰Bahya, Exodus, 10:19.

רוח ים is A WEST WIND.