Checkmate – Residency
25th sighting in Salish Sea
Checkmate @24175
Jul 18 – Sep 24, 2026 · Salish Sea
Herring-Bright and Known
Eight summers deep in these channels, and they still spot me first.
168 m
Deepest dive
5:49
Longest dive
73
Dives
- Sightings
- 5
- Days between first and last sighting
- 68
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Jul 18, 2026 | 202 m | 15.6°C | 168 m |
| Aug 4, 2026 | 57 m | 15.2°C | 43 m |
| Aug 5, 2026 | 165 m | 15.4°C | 133 m |
| Aug 21, 2026 | 155 m | 15.0°C | 35 m |
| Sep 24, 2026 | 70 m | — | 63 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
168 m
Deepest dive
5:49
Longest dive
73
Dives
29 m
Avg dive depth
5
Sightings
68
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 (202 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Jul 18, 2026
measured- Seafloor depth
- 202 m
- Sea-surface temperature
- 15.6°C
- Distance from shore
- 10.0 km
Across the residency · 5 sightings
measured- Seafloor depth
- 57 m – 202 m
- Sea-surface temperature
- 15.0°C – 15.6°C
- Distance from shore
- 2.0 km – 10.0 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.