| najas flexilis | | USA: South Dakota, Day Co. Enemy Swim Lake | | 697872442 |
| najas flexilis | | USA: South Dakota, Day Co. Enemy Swim Lake | | 697872699 |
| najas flexilis | | USA: South Dakota, Day Co. Enemy Swim Lake | | 697872830 |
| najas flexilis | | USA: South Dakota, Day Co. Enemy Swim Lake | | 697873114 |