Tens of pools of various shapes and sizes were observed in Northern Israel (between the Western- Galilee and Caesarea), and a few in central and southern Israel. The pools are usually cut into the coastal rocks, at sea-level or slightly lower, to allow water supply by gravity.  It seems that some of the pools were used for bathing, while others, for keeping live fish or Murex-shells (intended for producing purple-dye). At least one, at Akhziv, was fashioned as a true fishpond for aqua culture.