This is a mistranslation. The Hebrew berekhoth (So 7:4) simply means "pools" (Revised Version); "fish" is quite unwarrantably introduced in the King James Version. In Isa 19:10, again, instead of "all that make sluices and ponds for fish" (the King James Version), we should certainly read, with the Revised Version (British and American), "All they that work for hire shall be grieved in soul."