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

Checkmarks – Residency

173rd sighting in Monterey Bay
Fluke of Checkmarks
Checkmarks Confirmed in the catalog @700
May 11 – Jun 11, 2023 · Monterey Bay

May Anchoring

Found my rhythm in the familiar waters where the food runs thick.

251 m
Deepest dive
7:40
Longest dive
89
Dives
Sightings
7
Days between first and last sighting
31

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
May 11, 202388 m12.9°C52 m
May 12, 202376 m12.5°C55 m
May 15, 2023307 m14.1°C251 m
May 24, 202377 m13.5°C65 m
May 24, 2023118 m13.5°C43 m
Jun 10, 202330 m—27 m
Jun 11, 202343 m14.2°C39 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 11, 2023 — seafloor 88 m (measured), deepest dive 52 m (modelled)May 11May 12, 2023 — seafloor 76 m (measured), deepest dive 55 m (modelled)May 12May 15, 2023 — seafloor 307 m (measured), deepest dive 251 m (modelled)May 15May 24, 2023 — seafloor 77 m (measured), deepest dive 65 m (modelled)May 24May 24, 2023 — seafloor 118 m (measured), deepest dive 43 m (modelled)May 24Jun 10, 2023 — seafloor 30 m (measured), deepest dive 27 m (modelled)Jun 10Jun 11, 2023 — seafloor 43 m (measured), deepest dive 39 m (modelled)Jun 11

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

Dives

251 m
Deepest dive
7:40
Longest dive
89
Dives
27 m
Avg dive depth
7
Sightings
31
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
0150300251 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (307 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 · May 15, 2023

measured
Seafloor depth
307 m
Sea-surface temperature
14.1°C
Distance from shore
8.0 km

Across the residency · 7 sightings

measured
Seafloor depth
30 m – 307 m
Sea-surface temperature
12.5°C – 14.2°C
Distance from shore
2.0 km – 12.0 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 7 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.