Halloween – Residency
11th sighting in Gulf of Maine
Halloween @56755
Aug 6 – 21, 2026 · Gulf of Maine
This Cold Green Shelf, Mine
August full of familiar fins and the shallow chill I know so well.
41 m
Deepest dive
1:51
Longest dive
73
Dives
- Sightings
- 6
- Days between first and last sighting
- 15
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Aug 6, 2026 | 14 m | 14.7°C | 9 m |
| Aug 11, 2026 | 45 m | 17.9°C | 38 m |
| Aug 12, 2026 | 19 m | 17.1°C | 17 m |
| Aug 13, 2026 | 15 m | 14.5°C | 12 m |
| Aug 16, 2026 | 52 m | 13.4°C | 41 m |
| Aug 21, 2026 | 45 m | 15.3°C | 29 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
41 m
Deepest dive
1:51
Longest dive
73
Dives
11 m
Avg dive depth
6
Sightings
15
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 (52 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 16, 2026
measured- Seafloor depth
- 52 m
- Sea-surface temperature
- 13.4°C
- Distance from shore
- 4.0 km
Across the residency · 6 sightings
measured- Seafloor depth
- 14 m – 52 m
- Sea-surface temperature
- 13.4°C – 17.9°C
- Distance from shore
- 1.0 km – 15.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 6 catalogued encounters on Happywhale.