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Monterey Bay

Lefty – Residency

142nd sighting in Monterey Bay
Fluke of Lefty
Lefty Confirmed in the catalog @934
Jul 16 – Oct 21, 2023 · Monterey Bay

Monterey Summer

Three months of good feeding kept me close to home.

186 m
Deepest dive
5:23
Longest dive
237
Dives
Sightings
21
Days between first and last sighting
97

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jul 16, 202363 m15.4°C45 m
Jul 24, 202395 m14.6°C65 m
Jul 24, 202394 m14.7°C77 m
Jul 26, 202389 m14.3°C63 m
Jul 26, 202394 m14.4°C60 m
Jul 27, 202338 m14.4°C33 m
Jul 28, 202390 m14.3°C27 m
Jul 29, 202394 m14.2°C76 m
Jul 29, 2023567 m14.5°C100 m
Aug 11, 2023125 m14.9°C104 m
Aug 13, 202379 m15.1°C37 m
Aug 14, 2023567 m15.7°C99 m
Aug 15, 2023567 m16.7°C186 m
Aug 26, 2023256 m17.8°C55 m
Sep 1, 202381 m17.6°C62 m
Sep 1, 202378 m17.6°C46 m
Sep 5, 202358 m16.8°C53 m
Sep 17, 202386 m16.2°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
Jul 16, 2023 — seafloor 63 m (measured), deepest dive 45 m (modelled)Jul 16Jul 24, 2023 — seafloor 95 m (measured), deepest dive 65 m (modelled)Jul 24, 2023 — seafloor 94 m (measured), deepest dive 77 m (modelled)Jul 26, 2023 — seafloor 89 m (measured), deepest dive 63 m (modelled)Jul 26, 2023 — seafloor 94 m (measured), deepest dive 60 m (modelled)Jul 26Jul 27, 2023 — seafloor 38 m (measured), deepest dive 33 m (modelled)Jul 28, 2023 — seafloor 90 m (measured), deepest dive 27 m (modelled)Jul 29, 2023 — seafloor 94 m (measured), deepest dive 76 m (modelled)Jul 29, 2023 — seafloor 567 m (measured), deepest dive 100 m (modelled)Jul 29Aug 11, 2023 — seafloor 125 m (measured), deepest dive 104 m (modelled)Aug 13, 2023 — seafloor 79 m (measured), deepest dive 37 m (modelled)Aug 14, 2023 — seafloor 567 m (measured), deepest dive 99 m (modelled)Aug 15, 2023 — seafloor 567 m (measured), deepest dive 186 m (modelled)Aug 15Aug 26, 2023 — seafloor 256 m (measured), deepest dive 55 m (modelled)Sep 1, 2023 — seafloor 81 m (measured), deepest dive 62 m (modelled)Sep 1, 2023 — seafloor 78 m (measured), deepest dive 46 m (modelled)Sep 5, 2023 — seafloor 58 m (measured), deepest dive 53 m (modelled)Sep 5Sep 17, 2023 — seafloor 86 m (measured), deepest dive 39 m (modelled)Oct 16, 2023 — seafloor 25 m (measured), deepest dive 21 m (modelled)Oct 17, 2023 — seafloor 122 m (measured), deepest dive 63 m (modelled)Oct 21, 2023 — seafloor 83 m (measured), deepest dive 72 m (modelled)Oct 21

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

Dives

186 m
Deepest dive
5:23
Longest dive
237
Dives
25 m
Avg dive depth
21
Sightings
97
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
0100200186 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (567 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 · Aug 15, 2023

measured
Seafloor depth
567 m
Sea-surface temperature
16.7°C
Distance from shore
16.0 km

Across the residency · 21 sightings

measured
Seafloor depth
25 m – 567 m
Sea-surface temperature
14.2°C – 17.8°C
Distance from shore
1.0 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 21 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.