Grand Manan – Residency
13th sighting in Gulf of Maine
Grand Manan @7329
Aug 5 – 27, 2026 · Gulf of Maine
Herring Season, Every Fold of It
Bottom drops away, herring pile up thick — I never miss this shelf in August.
36 m
Deepest dive
1:58
Longest dive
113
Dives
- Sightings
- 6
- Days between first and last sighting
- 22
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Aug 5, 2026 | 45 m | 15.1°C | 35 m |
| Aug 9, 2026 | 25 m | 17.8°C | 17 m |
| Aug 12, 2026 | 19 m | 17.1°C | 16 m |
| Aug 21, 2026 | 16 m | 15.3°C | 14 m |
| Aug 25, 2026 | 42 m | 17.9°C | 36 m |
| Aug 27, 2026 | 15 m | 17.4°C | 14 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
36 m
Deepest dive
1:58
Longest dive
113
Dives
10 m
Avg dive depth
6
Sightings
22
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 (42 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 25, 2026
measured- Seafloor depth
- 42 m
- Sea-surface temperature
- 17.9°C
- Distance from shore
- 2.0 km
Across the residency · 6 sightings
measured- Seafloor depth
- 15 m – 45 m
- Sea-surface temperature
- 15.1°C – 17.9°C
- Distance from shore
- 1.0 km – 15.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 6 catalogued encounters on Happywhale.