INN reports that a school of barbel fish, commonly known as "Nasrallah fish" in Israel, was observed in the Gulf of Eilat in a spectacular display of the fish gathering into a dense ball.

Sea barbel is a well-known and familiar Indo-Pacific species and the Gulf of Eilat is considered one of its spawning areas. The fish tend to coalesce into a dense ball and their movement in the water is impressive in its beauty.

Source - INN - Video Source - Israel  Nature and Parks Authority/Youtube