Jellyfish of the "wandering thread" species of unprecedented sizes have been observed in recent days along the coast of Israel. The weight of the largest measured exceeds 30 kilograms.

"Winter swarms of threadworms have been commonplace in recent years, but this year the size of the jellyfish is definitely unusual," says marine biologist Dr. Dor Edalist. The impressive amounts of precipitation this winter caused the Jellyfish to arrive, says Dr. Edalist, one of the founders of the civil science site "Medusas in the Nation"