Heterotheca – Residency
2nd sighting in Lynn Canal & Stephens Passage
Heterotheca @12799
Apr 28 – Jun 18, 2026 · Lynn Canal & Stephens Passage
Chatham Strait, Herring Season
Thin from the crossing, now these green corridors fatten me right up.
194 m
Deepest dive
5:47
Longest dive
34
Dives
- Sightings
- 3
- Days between first and last sighting
- 51
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Apr 28, 2026 | 38 m | 5.7°C | 24 m |
| Apr 28, 2026 | 31 m | 5.7°C | 24 m |
| Jun 18, 2026 | 275 m | 10.0°C | 194 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
194 m
Deepest dive
5:47
Longest dive
34
Dives
22 m
Avg dive depth
3
Sightings
51
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 (275 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Jun 18, 2026
measured- Seafloor depth
- 275 m
- Sea-surface temperature
- 10.0°C
- Distance from shore
- 2.0 km
Across the residency · 3 sightings
measured- Seafloor depth
- 31 m – 275 m
- Sea-surface temperature
- 5.7°C – 10.0°C
- Distance from shore
- 2.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 3 catalogued encounters on Happywhale.