Periscope – Residency
4th sighting in Gulf of Maine
Periscope @10416
Jul 6 – Aug 7, 2026 · Gulf of Maine
Green Water Season
Cold shelf water, mid-summer feeding — this is exactly where I belong.
52 m
Deepest dive
2:09
Longest dive
11
Dives
- Sightings
- 2
- Days between first and last sighting
- 32
- Deepest dive on record
- 52 m · this residency
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Jul 6, 2026 | 119 m | 14.0°C | 31 m |
| Aug 7, 2026 | 60 m | 15.2°C | 52 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
52 m
Deepest dive
2:09
Longest dive
11
Dives
21 m
Avg dive depth
2
Sightings
32
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 (60 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 7, 2026
measured- Seafloor depth
- 60 m
- Sea-surface temperature
- 15.2°C
- Distance from shore
- 10.0 km
Across the residency · 2 sightings
measured- Seafloor depth
- 60 m – 119 m
- Sea-surface temperature
- 14.0°C – 15.2°C
- Distance from shore
- 10.0 km – 16.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 2 catalogued encounters on Happywhale.