They are called Haenyo (海女). The number of women engaging in this old profession is decreasing and the majority of them are very old. As far as I know, there are only several hundreds remaining today.

I know it just from the running man which is a korean program.

I really admire the ahjummas for their courage in doing this stuff. It's no joke and can be very dangerous.

interesting

They are forced by the life. Maybe can invent a laser pointer which second stun the fish and inkfish.