Competitors for 2018 Ultra Marathon Swimming World Series
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Xavier Desharnais |  CAN |
OWS | 1 March 1990 |
| Morgane Dornic |  FRA |
OWS | 22 October 1998 |
| Pilar Geijo |  ARG |
OWS | 19 September 1984 |
| Barbara Pozzobon |  ITA |
OWS | 17 September 1993 |
| Edoardo Stochino | ITA |
OWS | 5 November 1987 |
| Alexander Studzinski |  GER |
OWS | 19 January 1983 |