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Monterey Bay

HW-MN0503805 – Residency

22nd sighting in Monterey Bay
Fluke of HW-MN0503805
HW-MN0503805 Confirmed in the catalog @142127
Nov 9, 2025 – Sep 28, 2026 · Monterey Bay

Spring Thick With Whales

Green water, thick feed, my tail everywhere this spring.

260 m
Deepest dive
8:14
Longest dive
189
Dives
Sightings
18
Days between first and last sighting
323
Deepest dive on record
260 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Nov 9, 2025139 m—35 m
Nov 19, 2025128 m—25 m
Nov 22, 2025444 m—238 m
Nov 27, 2025162 m—108 m
Nov 28, 2025147 m—20 m
Dec 13, 202590 m—82 m
Dec 20, 202594 m—56 m
Mar 13, 202687 m13.3°C54 m
Mar 14, 2026317 m13.2°C260 m
Mar 29, 2026401 m13.6°C184 m
May 21, 202681 m11.6°C74 m
Jul 16, 202660 m16.3°C43 m
Jul 22, 2026472 m17.1°C154 m
Jul 23, 2026129 m17.0°C41 m
Jul 29, 2026254 m16.7°C21 m
Jul 30, 2026104 m16.6°C72 m
Aug 5, 202667 m17.1°C44 m
Sep 28, 2026100 m—70 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
Nov 9, 2025 — seafloor 139 m (measured), deepest dive 35 m (modelled)Nov 9Nov 19, 2025 — seafloor 128 m (measured), deepest dive 25 m (modelled)Nov 22, 2025 — seafloor 444 m (measured), deepest dive 238 m (modelled)Nov 27, 2025 — seafloor 162 m (measured), deepest dive 108 m (modelled)Nov 27Nov 28, 2025 — seafloor 147 m (measured), deepest dive 20 m (modelled)Dec 13, 2025 — seafloor 90 m (measured), deepest dive 82 m (modelled)Dec 20, 2025 — seafloor 94 m (measured), deepest dive 56 m (modelled)Dec 20Mar 13, 2026 — seafloor 87 m (measured), deepest dive 54 m (modelled)Mar 14, 2026 — seafloor 317 m (measured), deepest dive 260 m (modelled)Mar 29, 2026 — seafloor 401 m (measured), deepest dive 184 m (modelled)Mar 29May 21, 2026 — seafloor 81 m (measured), deepest dive 74 m (modelled)Jul 16, 2026 — seafloor 60 m (measured), deepest dive 43 m (modelled)Jul 22, 2026 — seafloor 472 m (measured), deepest dive 154 m (modelled)Jul 22Jul 23, 2026 — seafloor 129 m (measured), deepest dive 41 m (modelled)Jul 29, 2026 — seafloor 254 m (measured), deepest dive 21 m (modelled)Jul 30, 2026 — seafloor 104 m (measured), deepest dive 72 m (modelled)Jul 30Aug 5, 2026 — seafloor 67 m (measured), deepest dive 44 m (modelled)Sep 28, 2026 — seafloor 100 m (measured), deepest dive 70 m (modelled)

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

Dives

260 m
Deepest dive
8:14
Longest dive
189
Dives
27 m
Avg dive depth
18
Sightings
323
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
0150300260 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (317 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 · Mar 14, 2026

measured
Seafloor depth
317 m
Sea-surface temperature
13.2°C
Distance from shore
5.0 km

Across the residency · 18 sightings

measured
Seafloor depth
60 m – 472 m
Sea-surface temperature
11.6°C – 17.1°C
Distance from shore
2.0 km – 13.0 km

Sources: GEBCO seafloor grid · NOAA OISST sea temperature · PacIOOS coastline distance

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

Source records

This activity is assembled from 18 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.