Cotter – Residency
3rd sighting in Gulf of Maine
Cotter @143240
Aug 15 – Sep 3, 2025 · Gulf of Maine
Gulf of Maine · Aug – Sep 2025
57 m
Deepest dive
2:30
Longest dive
26
Dives
- Sightings
- 3
- Days between first and last sighting
- 19
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Aug 15, 2025 | 164 m | — | 44 m |
| Sep 2, 2025 | 138 m | — | 54 m |
| Sep 3, 2025 | 187 m | — | 57 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
57 m
Deepest dive
2:30
Longest dive
26
Dives
23 m
Avg dive depth
3
Sightings
19
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 (187 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Sep 3, 2025
measured- Seafloor depth
- 187 m
- Sea-surface temperature
- —
- Distance from shore
- 28.0 km
Across the residency · 3 sightings
measured- Seafloor depth
- 138 m – 187 m
- Sea-surface temperature
- —
- Distance from shore
- 25.0 km – 36.0 km
Sources: GEBCO seafloor grid · PacIOOS coastline distance
Source records
This activity is assembled from 3 catalogued encounters on Happywhale.