Which Greek island is known and billed as the ''Sponge-divers island''?

Poor sponges minding there on business next thing they know they’re plucked from their under water haven just to be used as a bathing sponge or to wipe somebody’s behind lol!

Tarpon Springs FL. is home to many Greeks who came to the Gulf for sponging.

Maestro13, on the island of Xalki there is a road called Tarpon Springs Boulevard, paid for by sponge diving emigrants from the island.