2025 calf of Big Mama – Residency
15th sighting in Salish Sea
2025 calf of Big Mama @139746
May 21 – Jul 10, 2025 · Salish Sea
Salish Sea · May – Jul 2025
168 m
Deepest dive
6:07
Longest dive
231
Dives
- Sightings
- 15
- Days between first and last sighting
- 50
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| May 21, 2025 | 172 m | — | 88 m |
| May 21, 2025 | 23 m | — | 14 m |
| May 21, 2025 | 268 m | — | 76 m |
| May 21, 2025 | 55 m | — | 39 m |
| May 22, 2025 | 109 m | — | 35 m |
| May 25, 2025 | 269 m | — | 34 m |
| May 29, 2025 | 33 m | — | 22 m |
| May 31, 2025 | 68 m | — | 36 m |
| Jun 7, 2025 | 102 m | — | 86 m |
| Jun 7, 2025 | 193 m | — | 64 m |
| Jun 25, 2025 | 159 m | — | 111 m |
| Jun 29, 2025 | 188 m | — | 121 m |
| Jul 3, 2025 | 183 m | — | 168 m |
| Jul 9, 2025 | 163 m | — | 140 m |
| Jul 10, 2025 | 108 m | — | 34 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
6:07
Longest dive
231
Dives
21 m
Avg dive depth
15
Sightings
50
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 (183 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Jul 3, 2025
measured- Seafloor depth
- 183 m
- Sea-surface temperature
- —
- Distance from shore
- 3.0 km
Across the residency · 15 sightings
measured- Seafloor depth
- 23 m – 269 m
- Sea-surface temperature
- —
- Distance from shore
- 1.0 km – 14.0 km
Sources: GEBCO seafloor grid · PacIOOS coastline distance
Source records
This activity is assembled from 15 catalogued encounters on Happywhale.