Complex sentence: Prewitt has achieved one of the rarest feats in offshore ocean Billfishing when an Angler catches and releases any three of five Billfish (Blue Marlin, White Marlin, Sailfish, Spearfish or Swordfish) within a single day.
Split into simpler sentences: Prewitt has achieved one of the rarest feats in offshore ocean Billfishing. This is when an Angler catches and releases any three of five Billfish (Blue Marlin, White Marlin, Sailfish, Spearfish or Swordfish) within a single day.