All were discovered in a cave in the Rale region, close to Tel Aviv, during research into the ecosystems of aquifers.
"The fact that these species have been apparently living for millions of years in the caves without ever having been discovered is very rare," said Hanan Dimentman of the university's department of ecology.
"Their whole way of life is totally new to us. It's like a new world underground."
The discoveries have yet to be given a name, but Dimentman said they could be divided into categories of scorpions and bacteria.
"The blind scorpions that we discovered are predators and are distant cousins of other scorpions which have never been found before in the Middle East," he added.
Species of blind scorpions are known to live in South America but it is the first time they have been discovered in the Middle East region.