A fishing method called, fishing, uses a large net that encircles the target to catch surface-dwelling species such as tuna, mackerel, anchovies, and herring, which tend to feed in schools near the surface or in shallow areas.

Purse seine fishing

Explanation:

Purse-seine fishing in considered to be an efficient form of fishing

It has no contact with the seabed and can have low levels of bycatch (accidental catch of unwanted species)A vertical net ‘curtain’ is used to surround the school of fish, the bottom of which is then drawn together to enclose the fish, rather like tightening the cords of a drawstring purseA purse seine is made of a long wall of netting framed with floatline and leadline (usually, of equal or longer length than the former) and having purse rings hanging from the lower edge of the gear, through which runs a purse line made from steel wire or rope which allow the pursing of the net

They formed the oceans.  as they melted water was formed and the water made the oceans