Casper – Residency
34th sighting in Chatham Strait
Casper @26833
Jun 25 – Sep 11, 2025 · Chatham Strait
Chatham Strait · Jun – Sep 2025
99 m
Deepest dive
3:01
Longest dive
95
Dives
- Sightings
- 9
- Days between first and last sighting
- 77
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Jun 25, 2025 | 44 m | 11.0°C | 32 m |
| Jul 10, 2025 | 61 m | 12.8°C | 33 m |
| Jul 14, 2025 | 37 m | 13.1°C | 29 m |
| Jul 17, 2025 | 4 m | 12.0°C | 3 m |
| Aug 16, 2025 | 139 m | 14.8°C | 99 m |
| Aug 18, 2025 | 11 m | 14.1°C | 9 m |
| Aug 19, 2025 | 103 m | 14.2°C | 44 m |
| Sep 8, 2025 | 108 m | 14.3°C | 83 m |
| Sep 11, 2025 | 154 m | 12.9°C | 75 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
99 m
Deepest dive
3:01
Longest dive
95
Dives
20 m
Avg dive depth
9
Sightings
77
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 (139 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 16, 2025
measured- Seafloor depth
- 139 m
- Sea-surface temperature
- 14.8°C
- Distance from shore
- 1.0 km
Across the residency · 9 sightings
measured- Seafloor depth
- 4 m – 154 m
- Sea-surface temperature
- 11.0°C – 14.8°C
- Distance from shore
- 1.0 km – 2.0 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.