Twain – Residency
21st sighting in Chatham Strait
Twain @15200
Aug 1 – 26, 2025 · Chatham Strait
Chatham Strait · Aug 2025
156 m
Deepest dive
5:01
Longest dive
22
Dives
- Sightings
- 3
- Days between first and last sighting
- 25
- Deepest dive on record
- 156 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) |
|---|---|---|---|
| Aug 1, 2025 | 22 m | 14.1°C | 17 m |
| Aug 16, 2025 | 189 m | 14.7°C | 156 m |
| Aug 26, 2025 | 295 m | 14.7°C | 32 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
156 m
Deepest dive
5:01
Longest dive
22
Dives
22 m
Avg dive depth
3
Sightings
25
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 (189 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 16, 2025
measured- Seafloor depth
- 189 m
- Sea-surface temperature
- 14.7°C
- Distance from shore
- 2.0 km
Across the residency · 3 sightings
measured- Seafloor depth
- 22 m – 295 m
- Sea-surface temperature
- 14.1°C – 14.7°C
- Distance from shore
- 2.0 km – 7.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 3 catalogued encounters on Happywhale.