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Monterey Bay

Heart Attack – Residency

46th sighting in Monterey Bay
Fluke of Heart Attack
Heart Attack Confirmed in the catalog @93954
Mar 24 – Apr 25, 2025 · Monterey Bay

Monterey Bay · Mar – Apr 2025

134 m
Deepest dive
4:09
Longest dive
95
Dives
Sightings
12
Days between first and last sighting
32

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Mar 24, 2025136 m12.5°C85 m
Mar 25, 2025113 m12.5°C73 m
Apr 3, 2025207 m12.3°C92 m
Apr 4, 202561 m12.4°C38 m
Apr 5, 202563 m12.6°C56 m
Apr 6, 202574 m12.9°C43 m
Apr 6, 202583 m12.8°C29 m
Apr 9, 2025121 m12.5°C40 m
Apr 11, 2025173 m13.3°C134 m
Apr 12, 2025258 m12.8°C40 m
Apr 21, 2025266 m13.0°C66 m
Apr 25, 202570 m12.9°C39 m

Seafloor and sea temperature measured · ✳ dives modelled

Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors

Deepest dive against the seafloor, per sighting

Seafloor · measured Deepest dive · modelled
Mar 24, 2025 — seafloor 136 m (measured), deepest dive 85 m (modelled)Mar 24Mar 25, 2025 — seafloor 113 m (measured), deepest dive 73 m (modelled)Mar 25Apr 3, 2025 — seafloor 207 m (measured), deepest dive 92 m (modelled)Apr 3Apr 4, 2025 — seafloor 61 m (measured), deepest dive 38 m (modelled)Apr 4Apr 5, 2025 — seafloor 63 m (measured), deepest dive 56 m (modelled)Apr 5Apr 6, 2025 — seafloor 74 m (measured), deepest dive 43 m (modelled)Apr 6Apr 6, 2025 — seafloor 83 m (measured), deepest dive 29 m (modelled)Apr 6Apr 9, 2025 — seafloor 121 m (measured), deepest dive 40 m (modelled)Apr 9Apr 11, 2025 — seafloor 173 m (measured), deepest dive 134 m (modelled)Apr 11Apr 12, 2025 — seafloor 258 m (measured), deepest dive 40 m (modelled)Apr 12Apr 21, 2025 — seafloor 266 m (measured), deepest dive 66 m (modelled)Apr 21Apr 25, 2025 — seafloor 70 m (measured), deepest dive 39 m (modelled)Apr 25

Depth runs down from the surface. The modelled dive never passes the measured seafloor at that sighting.

Dives

134 m
Deepest dive
4:09
Longest dive
95
Dives
26 m
Avg dive depth
12
Sightings
32
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
075150134 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (173 m) and the published dive-behaviour distribution. Modelled, not measured.

Deep Effort Score

Deep

Depth, duration and recovery resolved into a single number for this session.

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Place

Where this happened · Apr 11, 2025

measured
Seafloor depth
173 m
Sea-surface temperature
13.3°C
Distance from shore
2.0 km

Across the residency · 12 sightings

measured
Seafloor depth
61 m – 266 m
Sea-surface temperature
12.3°C – 13.3°C
Distance from shore
2.0 km – 14.0 km

Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance

Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors

Source records

This activity is assembled from 12 catalogued encounters on Happywhale.

Sighting records from Happywhale, published as occurrence data via GBIF. Individual records are licensed CC0 1.0, CC BY 4.0 or CC BY-NC 4.0, depending on the contributor.

The photographs and fluke identifications behind every sighting are the work of the contributing observers — the citizen scientists, naturalists and operators who logged them, each named in the underlying GBIF occurrence record. Every activity links out to its source encounters on Happywhale. Basemaps © OpenStreetMap contributors (ODbL).

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Breach is an independent project. It is not affiliated with, nor endorsed by, Happywhale or GBIF.