In the Parable of the Net, angels are pictured as casting a net into the earth to gather people for judgment (Matthew 13:47–50; 25:31–33). As with the previous four parables in Matthew 13,the Parable of the Net has a twin in the Parable of the Tares (Matthew 13:24–30, 36–43). The first emphasizes separating believers from unbelievers at the end. The second emphasizes their coexistence in this world (Matthew 13:39–41; cf. John 5:28–29).
A comparison of the parables shows the following parallels:
The field/sea is the world (Psalm 104:25).

Both kinds (good and bad) in the net shows the proximity of saints and sinners in the kingdom.

The beach represents the end of time. 

Growing till harvest/filled nets shows God’s longsuffering (2 Peter 3:1–9).

Wheat/good fish are children of the kingdom.

Tares/bad fish are children of Satan.

Gathered/caught and sorting refers to the Judgment Day.

Reapers/fisherman are angels (Matthew 24:31; 25:30–32; 2 Thessalonians 1:6–10; Revelation 14:19; 15:5–16:21).

The gathering of good into barn/vessels represents salvation in heaven.