2025 Alpha – Residency
10th sighting in South Africa
2025 Alpha @141800
Jul 28 – Aug 16, 2025 · South Africa
South Africa · Jul – Aug 2025
25 m
Deepest dive
1:21
Longest dive
95
Dives
- Sightings
- 10
- Days between first and last sighting
- 19
- Deepest dive on record
- 25 m · this residency
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Jul 28, 2025 | 26 m | — | 23 m |
| Aug 6, 2025 | 24 m | — | 22 m |
| Aug 6, 2025 | 24 m | — | 15 m |
| Aug 7, 2025 | 23 m | — | 17 m |
| Aug 10, 2025 | 24 m | — | 22 m |
| Aug 11, 2025 | 24 m | — | 13 m |
| Aug 12, 2025 | 22 m | — | 17 m |
| Aug 14, 2025 | 32 m | — | 25 m |
| Aug 15, 2025 | 20 m | — | 18 m |
| Aug 16, 2025 | 24 m | — | 22 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
25 m
Deepest dive
1:21
Longest dive
95
Dives
11 m
Avg dive depth
10
Sightings
19
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 (32 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 14, 2025
measured- Seafloor depth
- 32 m
- Sea-surface temperature
- —
- Distance from shore
- 9.0 km
Across the residency · 10 sightings
measured- Seafloor depth
- 20 m – 32 m
- Sea-surface temperature
- —
- Distance from shore
- 8.0 km – 10.0 km
Sources: GEBCO seafloor grid · PacIOOS coastline distance
Source records
This activity is assembled from 10 catalogued encounters on Happywhale.