They caught so many fish that their nets almost broke. They caught so many fish that their boats began to sink.
The great result when he had expected nothing frightens Simon. He begs Jesus to leave him alone, that he is not worthy to be with him.
He can provide fish where professional fishermen can't find them. He tells Simon and his partners, James and John, that now they will be fishing not for fish but for people.
They walk away from their boats--their livelihood, their regular lives, and follow Jesus.
Further note: the first hearers of Luke's gospel may have been familiar with Ezekiel 47:1-10. We should be, too.
A steam of water from the temple gushes like a river, like deep water. In this sea, the water will become wholesome. Every living creature will be able to live wherever this stream goes. The fish will be abundant.