PURPORT

The Lord assumed one fish incarnation to save the Vedas at the beginning of the Svayambhuva-manvantara, and at the end of the Caksusa-manvantara the Lord again assumed the form of a fish just to favor the great king named Satyavrata. As there were two incarnations of Varaha, there were also two incarnations of fish. The Lord appeared as one fish incarnation to save the Vedas by killing Hayagriva, and He assumed the other fish incarnation to show favor to King Satyavrata.