Why are the fisher men fish Herring-Fish with large numbers so easy?

Question

Is it because they lay at the bottom of sea motionless during the day or because they r availabe in vast schools!!I MUST CHOOSE ONE OF THE TWO SO DON'T REPLY SAYING: BOTH ANSWERS R RIGHT,OK!!THIS IS SO CONFUSING!!

Answer 1

they use big nets, and they are available in large schools

Answer 2

Commercial fishermen often use aeroplanes to scout where the schools of fish are. The planes guide the fishing boats to the vast schools of fish, where they can be caught in big nets.

Answer 3

and they also use something like a GPS to locate the schools of fish so they have a 90% chance of a full catch