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

Jolly Roger – Residency

24th sighting in Monterey Bay
Fluke of Jolly Roger
Jolly Roger Confirmed in the catalog @3377
Jul 13 – 23, 2025 · Monterey Bay

Monterey Bay · Jul 2025

85 m
Deepest dive
2:55
Longest dive
37
Dives
Sightings
3
Days between first and last sighting
11

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jul 13, 2025567 m12.9°C35 m
Jul 15, 202561 m15.3°C56 m
Jul 23, 202599 m15.8°C85 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
Jul 13, 2025 — seafloor 567 m (measured), deepest dive 35 m (modelled)Jul 13Jul 15, 2025 — seafloor 61 m (measured), deepest dive 56 m (modelled)Jul 15Jul 23, 2025 — seafloor 99 m (measured), deepest dive 85 m (modelled)Jul 23

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

Dives

85 m
Deepest dive
2:55
Longest dive
37
Dives
26 m
Avg dive depth
3
Sightings
11
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010085 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (99 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
99 m
Sea-surface temperature
15.8°C
Distance from shore
14.0 km

Across the residency · 3 sightings

measured
Seafloor depth
61 m – 567 m
Sea-surface temperature
12.9°C – 15.8°C
Distance from shore
3.0 km – 16.0 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 3 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.