NET
18 As he was walking by the Sea of Galilee he saw two brothers, Simon (called Peter) and Andrew his brother, casting a net into the sea (for they were fishermen).
Darby
18 And walking by the sea of Galilee, he saw two brothers, Simon called Peter, and Andrew his brother, casting a net into the sea, for they were fishers;
KJV
18 And Jesus, walking by the sea of Galilee, saw two brethren, Simon called Peter, and Andrew his brother, casting a net into the sea: for they were fishers.