Cornwallis – Residency
28th sighting in Clarence Strait
Cornwallis @6560
Jun 9 – Sep 6, 2026 · Clarence Strait
The Whole Green Summer
Chatham Strait held me from thaw to fall light, every tide known by heart.
257 m
Deepest dive
9:27
Longest dive
98
Dives
- Sightings
- 9
- Days between first and last sighting
- 88
- Deepest dive on record
- 257 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) |
|---|---|---|---|
| Jun 9, 2026 | 526 m | 9.8°C | 257 m |
| Jul 31, 2026 | 99 m | 12.7°C | 75 m |
| Aug 4, 2026 | 126 m | 12.8°C | 67 m |
| Aug 26, 2026 | 4 m | 14.0°C | 4 m |
| Aug 27, 2026 | 42 m | 14.5°C | 37 m |
| Aug 28, 2026 | 76 m | 14.5°C | 41 m |
| Aug 28, 2026 | 23 m | 14.4°C | 18 m |
| Sep 3, 2026 | 55 m | 13.2°C | 50 m |
| Sep 6, 2026 | 318 m | 13.4°C | 102 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
257 m
Deepest dive
9:27
Longest dive
98
Dives
26 m
Avg dive depth
9
Sightings
88
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 (526 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Jun 9, 2026
measured- Seafloor depth
- 526 m
- Sea-surface temperature
- 9.8°C
- Distance from shore
- 3.0 km
Across the residency · 9 sightings
measured- Seafloor depth
- 4 m – 526 m
- Sea-surface temperature
- 9.8°C – 14.5°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 9 catalogued encounters on Happywhale.