Arc – Residency
7th sighting in Sitka Sound & Outer Baranof
Arc @26180
Jun 11 – Jul 19, 2026 · Sitka Sound & Outer Baranof
Herring, Late Light, Company
Long summer light, thick herring, and I never fed alone this stretch.
78 m
Deepest dive
3:40
Longest dive
134
Dives
- Sightings
- 8
- Days between first and last sighting
- 38
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Jun 11, 2026 | 78 m | 10.3°C | 64 m |
| Jun 12, 2026 | 42 m | 10.2°C | 33 m |
| Jun 18, 2026 | 39 m | 10.2°C | 16 m |
| Jun 19, 2026 | 19 m | 9.8°C | 17 m |
| Jun 23, 2026 | 48 m | 11.6°C | 30 m |
| Jul 7, 2026 | 134 m | 12.1°C | 66 m |
| Jul 11, 2026 | 89 m | 12.4°C | 78 m |
| Jul 19, 2026 | 57 m | 13.1°C | 49 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
78 m
Deepest dive
3:40
Longest dive
134
Dives
20 m
Avg dive depth
8
Sightings
38
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 (89 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Jul 11, 2026
measured- Seafloor depth
- 89 m
- Sea-surface temperature
- 12.4°C
- Distance from shore
- 1.0 km
Across the residency · 8 sightings
measured- Seafloor depth
- 19 m – 134 m
- Sea-surface temperature
- 9.8°C – 13.1°C
- Distance from shore
- 1.0 km – 7.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 8 catalogued encounters on Happywhale.