Ocean Facts
Picture of ocean stuff.

Description

Smaller mackerel behave like herrings, and are captured in similar ways. Fish species like these, which school near the surface, can be caught efficiently by purse seining. Huge purse seiner vessels use spotter planes to locate the schooling fish. Then they close in using sophisticated sonar to track the shape of the shoal. Entire schools are then encircled with fast auxiliary boats which deploy purse seine nets as they speed around the school.