Gerhard – Residency
6th sighting in Lynn Canal & Stephens Passage
Gerhard @26699
May 28 – Sep 24, 2026 · Lynn Canal & Stephens Passage
Chatham Strait, Deep Summer
Whole season here and the strait kept surprising me.
162 m
Deepest dive
5:15
Longest dive
36
Dives
- Sightings
- 5
- Days between first and last sighting
- 118
- Deepest dive on record
- 162 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) |
|---|---|---|---|
| May 28, 2026 | 246 m | 8.2°C | 77 m |
| Jul 29, 2026 | 302 m | 12.8°C | 101 m |
| Aug 25, 2026 | 108 m | 14.5°C | 36 m |
| Aug 25, 2026 | 106 m | 14.5°C | 69 m |
| Sep 24, 2026 | 231 m | 10.6°C | 162 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
162 m
Deepest dive
5:15
Longest dive
36
Dives
27 m
Avg dive depth
5
Sightings
118
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 (231 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Sep 24, 2026
measured- Seafloor depth
- 231 m
- Sea-surface temperature
- 10.6°C
- Distance from shore
- 2.0 km
Across the residency · 5 sightings
measured- Seafloor depth
- 106 m – 302 m
- Sea-surface temperature
- 8.2°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 5 catalogued encounters on Happywhale.