Mathematician – Residency
23rd sighting in Salish Sea
Mathematician @4593
Jul 29 – Sep 23, 2025 · Salish Sea
Salish Sea · Jul – Sep 2025
110 m
Deepest dive
4:19
Longest dive
47
Dives
- Sightings
- 5
- Days between first and last sighting
- 56
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Jul 29, 2025 | 148 m | 15.0°C | 110 m |
| Aug 9, 2025 | 89 m | 14.6°C | 34 m |
| Aug 9, 2025 | 150 m | 14.6°C | 68 m |
| Aug 19, 2025 | 164 m | 14.8°C | 48 m |
| Sep 23, 2025 | 154 m | 13.4°C | 97 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
110 m
Deepest dive
4:19
Longest dive
47
Dives
29 m
Avg dive depth
5
Sightings
56
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 (148 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Jul 29, 2025
measured- Seafloor depth
- 148 m
- Sea-surface temperature
- 15.0°C
- Distance from shore
- 4.0 km
Across the residency · 5 sightings
measured- Seafloor depth
- 89 m – 164 m
- Sea-surface temperature
- 13.4°C – 15.0°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.