Why Did Rav Sign Like A Fish?

this is the way RAB used to sign his name it looked like a fish so ra up here when he opened up hisa in something like that he brought this gimar over here and he said RAV signed as the fish what's in the fish he said the mush thata gave that the fox came to the fish and said come come outside of the water let's hang out so the fish said I could barely survive in the water people with their fishing rods and their Nets you want me to come outside where I can't even breathe says shapir waterers Tyra and when you submerge yourself in Tyra so you have protection the is still trying to get you they still have protection outside of the water it's very difficult to survive says ra built all these yeshivas all around BB and his symbol was the fish