Heart Attack – Residency
55th sighting in Monterey Bay
Heart Attack @93954
Mar 15 – Apr 7, 2026 · Monterey Bay
Krill's Back, So Am I
Spring means krill dropping down my favorite shelf, and me right there for it.
127 m
Deepest dive
3:55
Longest dive
121
Dives
- Sightings
- 9
- Days between first and last sighting
- 23
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Mar 15, 2026 | 90 m | 12.9°C | 71 m |
| Mar 16, 2026 | 95 m | 13.2°C | 48 m |
| Mar 18, 2026 | 105 m | 13.8°C | 77 m |
| Mar 20, 2026 | 116 m | 14.1°C | 29 m |
| Mar 21, 2026 | 100 m | 13.8°C | 62 m |
| Mar 21, 2026 | 80 m | 13.8°C | 41 m |
| Mar 22, 2026 | 238 m | 13.8°C | 127 m |
| Mar 22, 2026 | 128 m | 13.8°C | 93 m |
| Apr 7, 2026 | 83 m | 14.3°C | 66 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
127 m
Deepest dive
3:55
Longest dive
121
Dives
26 m
Avg dive depth
9
Sightings
23
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 (238 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Mar 22, 2026
measured- Seafloor depth
- 238 m
- Sea-surface temperature
- 13.8°C
- Distance from shore
- 4.0 km
Across the residency · 9 sightings
measured- Seafloor depth
- 80 m – 238 m
- Sea-surface temperature
- 12.9°C – 14.3°C
- Distance from shore
- 2.0 km – 10.0 km
Sources: GEBCO seafloor grid · NOAA OISST sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 9 catalogued encounters on Happywhale.