| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:20.86 | 2025 Otters Team Championships | 2025-06-28 |
| 100m IM | 1:18.93 | 2026 Trojan Pentathlon | 2026-03-06 |
| 200m Breaststroke | 3:13.18 | 2026 Huronia SC Regional Championships | 2026-02-06 |
| 200m IM | 2:57.36 | Otters Devo & Distance Winter Waves | 2026-01-24 |
| 50m Backstroke | 35.47 | 2026 Trojan Pentathlon | 2026-03-06 |
| 50m Breaststroke | 39.68 | 2026 Trojan Pentathlon | 2026-03-06 |
| 50m Butterfly | 33.69 | 2026 Trojan Pentathlon | 2026-03-06 |
| 50m Freestyle | 30.44 | 2026 Huronia SC Regional Championships | 2026-02-06 |
Staniscia, Marissa's top personal bests include 100m Backstroke (1:20.86), 100m IM (1:18.93), 200m Breaststroke (3:13.18), 200m IM (2:57.36), 50m Backstroke (35.47).
Staniscia, Marissa swims for Orangeville Otters Swim Club.
Staniscia, Marissa has competed in 5 meets.