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

Roxbury – Residency

8th sighting in Monterey Bay
Fluke of Roxbury
Roxbury Confirmed in the catalog @139240
Apr 18 – May 25, 2025 · Monterey Bay

Monterey Bay · Apr – May 2025

131 m
Deepest dive
5:44
Longest dive
146
Dives
Sightings
8
Days between first and last sighting
37
Deepest dive on record
131 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Apr 18, 202560 m—51 m
Apr 20, 202563 m—36 m
Apr 21, 20251,598 m—131 m
Apr 28, 202575 m—61 m
Apr 28, 202573 m—47 m
May 12, 202557 m—41 m
May 12, 2025340 m—109 m
May 25, 202514 m—13 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
Apr 18, 2025 — seafloor 60 m (measured), deepest dive 51 m (modelled)Apr 18Apr 20, 2025 — seafloor 63 m (measured), deepest dive 36 m (modelled)Apr 20Apr 21, 2025 — seafloor 1,598 m (measured), deepest dive 131 m (modelled)Apr 21Apr 28, 2025 — seafloor 75 m (measured), deepest dive 61 m (modelled)Apr 28Apr 28, 2025 — seafloor 73 m (measured), deepest dive 47 m (modelled)Apr 28May 12, 2025 — seafloor 57 m (measured), deepest dive 41 m (modelled)May 12May 12, 2025 — seafloor 340 m (measured), deepest dive 109 m (modelled)May 12May 25, 2025 — seafloor 14 m (measured), deepest dive 13 m (modelled)May 25

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

Dives

131 m
Deepest dive
5:44
Longest dive
146
Dives
20 m
Avg dive depth
8
Sightings
37
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
075150131 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (1,598 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 21, 2025

measured
Seafloor depth
1,598 m
Sea-surface temperature
—
Distance from shore
12.0 km

Across the residency · 8 sightings

measured
Seafloor depth
14 m – 1,598 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 8 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.