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

Check – Residency

50th sighting in Monterey Bay
Fluke of Check
Check Confirmed in the catalog @2
Apr 9 – Jul 11, 2025 · Monterey Bay

Monterey Bay Return

Back to familiar waters after months tangled in lines, finally free to feed again.

52 m
Deepest dive
1:53
Longest dive
8
Dives
Sightings
3
Days between first and last sighting
93

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Apr 9, 202566 m12.6°C24 m
Apr 18, 202568 m12.1°C52 m
Jul 11, 2025-28 m11.7°C—

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 9, 2025 — seafloor 66 m (measured), deepest dive 24 m (modelled)Apr 9Apr 18, 2025 — seafloor 68 m (measured), deepest dive 52 m (modelled)Apr 18Jul 11, 2025 — seafloor -28 m (measured), deepest dive — (modelled)Jul 11

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

Dives

52 m
Deepest dive
1:53
Longest dive
8
Dives
22 m
Avg dive depth
3
Sightings
93
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010052 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (68 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 18, 2025

measured
Seafloor depth
68 m
Sea-surface temperature
12.1°C
Distance from shore
5.0 km

Across the residency · 3 sightings

measured
Seafloor depth
-28 m – 68 m
Sea-surface temperature
11.7°C – 12.6°C
Distance from shore
2.0 km – 5.0 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.