Mallard – Residency
12th sighting in Gulf of Maine
Mallard @7687
Aug 7 – Sep 4, 2025 · Gulf of Maine
Gulf of Maine · Aug – Sep 2025
100 m
Deepest dive
3:54
Longest dive
145
Dives
- Sightings
- 10
- Days between first and last sighting
- 28
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Aug 7, 2025 | 99 m | — | 87 m |
| Aug 9, 2025 | 75 m | — | 46 m |
| Aug 11, 2025 | 36 m | — | 32 m |
| Aug 15, 2025 | 120 m | — | 89 m |
| Aug 27, 2025 | 146 m | — | 95 m |
| Aug 31, 2025 | 144 m | — | 100 m |
| Sep 1, 2025 | 76 m | — | 59 m |
| Sep 4, 2025 | 121 m | — | 45 m |
| Sep 4, 2025 | 81 m | — | 72 m |
| Sep 4, 2025 | 146 m | — | 40 m |
Seafloor and sea temperature measured · ✳ dives modelled
Deepest dive against the seafloor, per sighting
Seafloor · measured Deepest dive · modelledDepth runs down from the surface. The modelled dive never passes the measured seafloor at that sighting.
Dives
100 m
Deepest dive
3:54
Longest dive
145
Dives
24 m
Avg dive depth
10
Sightings
28
Days first → last
Dive metrics are modelled within real depth limits — not measured
Get actual dive data with Risa Deep →Dive profile
modelledDepth shaped by the seafloor limit here (144 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 31, 2025
measured- Seafloor depth
- 144 m
- Sea-surface temperature
- —
- Distance from shore
- 8.0 km
Across the residency · 10 sightings
measured- Seafloor depth
- 36 m – 146 m
- Sea-surface temperature
- —
- Distance from shore
- 4.0 km – 28.0 km
Sources: GEBCO seafloor grid · PacIOOS coastline distance
Source records
This activity is assembled from 10 catalogued encounters on Happywhale.