What does Luke 5:7 mean?

Minutes before, Jesus was talking to a crowd so great He had to jump into a boat and push off from shore to get some room. Now, thanks to His instruction, Peter and Andrew are overwhelmed by such a large catch of fish that their nets are starting to break. They call their partners, James and John (Luke 5:10), but the weight threatens to sink both boats.

Peter responds immediately with humble and reverent fear. He learned from his brother Andrew that John the Baptist identified Jesus as the Messiah (John 1:35–42). This may be why they agreed to follow Jesus' command to try fishing again after a fruitless night. Having the Messiah take an interest in his profession and bless him in such a way makes Peter understand this is personal and very serious (Luke 5:8). Rabbis didn't focus on fishermen. Why would the savior of the Jews, promised by the prophets of old who heard directly from God, care about uneducated tradesmen?

Jesus doesn't tell Peter he's wrong, but He does tell him not to be afraid. He ties in the crowd and the fish. If Peter and the others follow Him and follow His instructions, they will catch a crowd of people for God's kingdom just as they caught the fish.