A large group of sharks, called a frenzy, has gathered off the coast of northern Israel, in a phenomenon that is becoming rare in other parts of the world but increasingly more common in Israel. Scientists believe the sharks are attracted to the Hadera electric power plant that uses seawater to cool its turbines before discharging the warmer water back into the sea.

Shark populations in the Mediterranean are dropping but the number of shark sightings off the Israeli coast has been rising in recent years. This phenomenon usually appears in the middle of the winter and has become more common in recent years.

Unusual activity among fish is prophesied in Ezekiel as preceding the War of Gog and Magog.

Surely in that day there shall be a great shaking in the land of Yisrael; so that the fishes of the sea and the fowls of the heaven and the beasts of the field and all creeping things that creep upon the ground and all the men that are upon the face of the earth shall shake at My presence. Ezekiel 38:20

The Tikunei Zohar (Tinyanya Tikkun 43), an esoteric book attributed to Rabbi Shimon bar Yochai in the first century, explains that this increase of fish signifies a specific stage of the Messianic process, in which the  Messiah from the House of Joseph and the Messiah of the house of David, two separate stages of the Messianic process, join together.

The Israeli Nature and Parks Authority (INPA) and the Israel Diving Authority issued warnings to bathers to avoid the area. The last reported shark attack on this part of the coast was in 1945 and the sharks are not considered aggressive unless provoked.