The Greek verb halieuō means to fish or to go fishing. It appears in John 21:3 when Peter declares "I am going fishing" after the resurrection — drawing the disciples back to the Sea of Tiberias.
Peter's declaration "I'm going out to fish" in John 21 is richly symbolic. Some interpret it as regression — returning to the old life after the trauma of the crucifixion and uncertainty of the resurrection. Jesus meets them at the point of their familiar labor, directs their nets, and reveals Himself. Then He commissions Peter not to fish for fish but to feed His sheep. The call does not negate the disciples' fishing identity — Jesus transforms it. Fishermen become fishers of men.