Grandpa Cookie – Residency
3rd sighting in Lynn Canal & Stephens Passage
Grandpa Cookie @23682
Sep 28 – 29, 2025 · Lynn Canal & Stephens Passage
Lynn Canal & Stephens Passage · Sep 2025
63 m
Deepest dive
2:45
Longest dive
33
Dives
- Sightings
- 2
- Days between first and last sighting
- 1
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Sep 28, 2025 | 74 m | 12.2°C | 63 m |
| Sep 29, 2025 | 57 m | 11.8°C | 40 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
63 m
Deepest dive
2:45
Longest dive
33
Dives
18 m
Avg dive depth
2
Sightings
1
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 (74 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Sep 28, 2025
measured- Seafloor depth
- 74 m
- Sea-surface temperature
- 12.2°C
- Distance from shore
- 2.0 km
Across the residency · 2 sightings
measured- Seafloor depth
- 57 m – 74 m
- Sea-surface temperature
- 11.8°C – 12.2°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 2 catalogued encounters on Happywhale.