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Monterey Bay

Borealis – Residency

24th sighting in Monterey Bay
Fluke of Borealis
Borealis Confirmed in the catalog @141545
May 29 – Dec 12, 2025 · Monterey Bay

Monterey Bay · May – Dec 2025

163 m
Deepest dive
9:45
Longest dive
242
Dives
Sightings
24
Days between first and last sighting
197
Deepest dive on record
163 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
May 29, 2025442 m—70 m
Jun 30, 20251,431 m—79 m
Jul 15, 20251,224 m—101 m
Jul 16, 2025140 m—73 m
Jul 19, 2025105 m—96 m
Jul 23, 2025266 m—163 m
Jul 24, 202561 m—45 m
Jul 24, 202578 m—66 m
Jul 31, 2025143 m—66 m
Aug 9, 202569 m—62 m
Aug 12, 2025106 m—29 m
Aug 23, 202586 m—69 m
Aug 29, 2025115 m—56 m
Aug 30, 202593 m—49 m
Aug 30, 202575 m—40 m
Aug 31, 2025493 m—95 m
Sep 2, 2025101 m—38 m
Sep 16, 202556 m—45 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
May 29, 2025 — seafloor 442 m (measured), deepest dive 70 m (modelled)May 29Jun 30, 2025 — seafloor 1,431 m (measured), deepest dive 79 m (modelled)Jul 15, 2025 — seafloor 1,224 m (measured), deepest dive 101 m (modelled)Jul 16, 2025 — seafloor 140 m (measured), deepest dive 73 m (modelled)Jul 19, 2025 — seafloor 105 m (measured), deepest dive 96 m (modelled)Jul 19Jul 23, 2025 — seafloor 266 m (measured), deepest dive 163 m (modelled)Jul 24, 2025 — seafloor 61 m (measured), deepest dive 45 m (modelled)Jul 24, 2025 — seafloor 78 m (measured), deepest dive 66 m (modelled)Jul 31, 2025 — seafloor 143 m (measured), deepest dive 66 m (modelled)Jul 31Aug 9, 2025 — seafloor 69 m (measured), deepest dive 62 m (modelled)Aug 12, 2025 — seafloor 106 m (measured), deepest dive 29 m (modelled)Aug 23, 2025 — seafloor 86 m (measured), deepest dive 69 m (modelled)Aug 29, 2025 — seafloor 115 m (measured), deepest dive 56 m (modelled)Aug 29Aug 30, 2025 — seafloor 93 m (measured), deepest dive 49 m (modelled)Aug 30, 2025 — seafloor 75 m (measured), deepest dive 40 m (modelled)Aug 31, 2025 — seafloor 493 m (measured), deepest dive 95 m (modelled)Sep 2, 2025 — seafloor 101 m (measured), deepest dive 38 m (modelled)Sep 2Sep 16, 2025 — seafloor 56 m (measured), deepest dive 45 m (modelled)Oct 21, 2025 — seafloor 71 m (measured), deepest dive 53 m (modelled)Oct 21, 2025 — seafloor 27 m (measured), deepest dive 21 m (modelled)Oct 23, 2025 — seafloor 20 m (measured), deepest dive 17 m (modelled)Oct 23Oct 25, 2025 — seafloor 48 m (measured), deepest dive 42 m (modelled)Oct 27, 2025 — seafloor 84 m (measured), deepest dive 67 m (modelled)Dec 12, 2025 — seafloor 79 m (measured), deepest dive 36 m (modelled)

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

Dives

163 m
Deepest dive
9:45
Longest dive
242
Dives
25 m
Avg dive depth
24
Sightings
197
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
0100200163 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (266 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 · Jul 23, 2025

measured
Seafloor depth
266 m
Sea-surface temperature
—
Distance from shore
11.0 km

Across the residency · 24 sightings

measured
Seafloor depth
20 m – 1,431 m
Sea-surface temperature
—
Distance from shore
1.0 km – 12.0 km

Sources: GEBCO seafloor grid · PacIOOS coastline distance

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

Source records

This activity is assembled from 24 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.