Sherona – Residency
31st sighting in Chatham Strait
Sherona @6441
Jul 14 – Aug 23, 2025 · Chatham Strait
Chatham Strait · Jul – Aug 2025
168 m
Deepest dive
5:50
Longest dive
62
Dives
- Sightings
- 4
- Days between first and last sighting
- 39
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Jul 14, 2025 | 581 m | 13.2°C | 168 m |
| Jul 16, 2025 | 4 m | 12.1°C | 4 m |
| Aug 14, 2025 | 132 m | 14.9°C | 104 m |
| Aug 23, 2025 | 90 m | 14.7°C | 39 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
168 m
Deepest dive
5:50
Longest dive
62
Dives
22 m
Avg dive depth
4
Sightings
39
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 (581 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Jul 14, 2025
measured- Seafloor depth
- 581 m
- Sea-surface temperature
- 13.2°C
- Distance from shore
- 3.0 km
Across the residency · 4 sightings
measured- Seafloor depth
- 4 m – 581 m
- Sea-surface temperature
- 12.1°C – 14.9°C
- Distance from shore
- 1.0 km – 3.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 4 catalogued encounters on Happywhale.