Butterfly – Residency
31st sighting in Iceland
Butterfly @16842
Aug 1 – Sep 2, 2026 · Iceland
Fjord Season, Herring Thick
Late summer here, throat full of herring, water knows my tail.
112 m
Deepest dive
4:05
Longest dive
89
Dives
- Sightings
- 5
- Days between first and last sighting
- 32
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Aug 1, 2026 | 20 m | 8.8°C | 18 m |
| Aug 11, 2026 | 125 m | 8.2°C | 24 m |
| Aug 15, 2026 | 88 m | 9.6°C | 65 m |
| Aug 22, 2026 | 126 m | 7.1°C | 112 m |
| Sep 2, 2026 | 17 m | 9.6°C | 13 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
112 m
Deepest dive
4:05
Longest dive
89
Dives
19 m
Avg dive depth
5
Sightings
32
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 (126 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 22, 2026
measured- Seafloor depth
- 126 m
- Sea-surface temperature
- 7.1°C
- Distance from shore
- 4.0 km
Across the residency · 5 sightings
measured- Seafloor depth
- 17 m – 126 m
- Sea-surface temperature
- 7.1°C – 9.6°C
- Distance from shore
- 1.0 km – 4.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 5 catalogued encounters on Happywhale.