Scratch – Residency
29th sighting in Chatham Strait
Scratch @5323
Aug 15 – Sep 2, 2026 · Chatham Strait
Herring Season, Same Green Water
Late summer herring thick enough to make the whole strait boil.
93 m
Deepest dive
3:15
Longest dive
15
Dives
- Sightings
- 2
- Days between first and last sighting
- 18
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Aug 15, 2026 | 240 m | 14.5°C | 93 m |
| Sep 2, 2026 | 18 m | 13.6°C | 17 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
93 m
Deepest dive
3:15
Longest dive
15
Dives
25 m
Avg dive depth
2
Sightings
18
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 (240 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 15, 2026
measured- Seafloor depth
- 240 m
- Sea-surface temperature
- 14.5°C
- Distance from shore
- 1.0 km
Across the residency · 2 sightings
measured- Seafloor depth
- 18 m – 240 m
- Sea-surface temperature
- 13.6°C – 14.5°C
- Distance from shore
- 1.0 km – 2.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 2 catalogued encounters on Happywhale.