The following are known Game Genie Codes for The Blue Marlin on Nintendo Entertainment System (NES).

• Line Is A 1000 Yards Long
  GENTUIZA
• Catch Fish Right After They Bite (Most Of The Time)
  AESVOXEG
• When Fish Bite They Are Close To The Boat
  PESVOXEK
• Line Is Set To 153 Feet
  OOSVOXEK
• Pull Fish In Quicker
  PESVXIAA
• Vitality Always At Max
  OZSVKKPV
  YASVSGPE