Hydra – Residency
39th sighting in Salish Sea
Hydra @4666
Jul 20 – Nov 29, 2025 · Salish Sea
Salish Sea · Jul – Nov 2025
149 m
Deepest dive
4:08
Longest dive
145
Dives
- Sightings
- 11
- Days between first and last sighting
- 132
- Deepest dive on record
- 149 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 20, 2025 | 180 m | 14.0°C | 103 m |
| Jul 23, 2025 | 178 m | 14.5°C | 149 m |
| Aug 2, 2025 | 144 m | 18.9°C | 88 m |
| Aug 4, 2025 | 174 m | 16.9°C | 43 m |
| Aug 10, 2025 | 128 m | 14.3°C | 67 m |
| Aug 16, 2025 | 168 m | 14.7°C | 61 m |
| Aug 16, 2025 | 184 m | 14.5°C | 72 m |
| Aug 16, 2025 | 115 m | 14.8°C | 82 m |
| Aug 17, 2025 | 176 m | 14.7°C | 93 m |
| Sep 28, 2025 | 158 m | 14.2°C | 76 m |
| Nov 29, 2025 | 144 m | 10.3°C | 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
149 m
Deepest dive
4:08
Longest dive
145
Dives
28 m
Avg dive depth
11
Sightings
132
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 (178 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Jul 23, 2025
measured- Seafloor depth
- 178 m
- Sea-surface temperature
- 14.5°C
- Distance from shore
- 7.0 km
Across the residency · 11 sightings
measured- Seafloor depth
- 115 m – 184 m
- Sea-surface temperature
- 10.3°C – 18.9°C
- Distance from shore
- 2.0 km – 11.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 11 catalogued encounters on Happywhale.