Polinahe – Residency
12th sighting in Chatham Strait
Polinahe @5462
Jul 20 – Aug 31, 2021 · Chatham Strait
Chatham Strait · Jul – Aug 2021
248 m
Deepest dive
7:49
Longest dive
69
Dives
- Sightings
- 7
- Days between first and last sighting
- 42
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Jul 20, 2021 | 160 m | 12.7°C | 133 m |
| Jul 21, 2021 | 81 m | 13.0°C | 62 m |
| Aug 5, 2021 | 88 m | 13.6°C | 39 m |
| Aug 16, 2021 | 55 m | 11.0°C | 43 m |
| Aug 26, 2021 | 356 m | 10.6°C | 163 m |
| Aug 31, 2021 | 127 m | 10.9°C | 110 m |
| Aug 31, 2021 | 272 m | 10.2°C | 248 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
248 m
Deepest dive
7:49
Longest dive
69
Dives
32 m
Avg dive depth
7
Sightings
42
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 (272 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 31, 2021
measured- Seafloor depth
- 272 m
- Sea-surface temperature
- 10.2°C
- Distance from shore
- 4.0 km
Across the residency · 7 sightings
measured- Seafloor depth
- 55 m – 356 m
- Sea-surface temperature
- 10.2°C – 13.6°C
- Distance from shore
- 2.0 km – 8.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 7 catalogued encounters on Happywhale.