Mosaic – Residency
30th sighting in Chatham Strait
Mosaic @5660
Jun 25 – Sep 6, 2026 · Chatham Strait
A Whole Summer of Herring
Cameras caught me all summer long — Chatham Strait knows my face well.
99 m
Deepest dive
3:35
Longest dive
58
Dives
- Sightings
- 6
- Days between first and last sighting
- 73
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, 2026 | 29 m | 11.7°C | 20 m |
| Jul 2, 2026 | 40 m | 11.4°C | 36 m |
| Jul 19, 2026 | 333 m | 12.9°C | 53 m |
| Jul 20, 2026 | 24 m | 13.1°C | 17 m |
| Jul 30, 2026 | 124 m | 13.2°C | 99 m |
| Sep 6, 2026 | 161 m | 13.1°C | 55 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
3:35
Longest dive
58
Dives
22 m
Avg dive depth
6
Sightings
73
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 (124 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Jul 30, 2026
measured- Seafloor depth
- 124 m
- Sea-surface temperature
- 13.2°C
- Distance from shore
- 2.0 km
Across the residency · 6 sightings
measured- Seafloor depth
- 24 m – 333 m
- Sea-surface temperature
- 11.4°C – 13.2°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 6 catalogued encounters on Happywhale.