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Monterey Bay

Lefty – Residency

66th sighting in Monterey Bay
Fluke of Lefty
Lefty Confirmed in the catalog @934
Sep 23 – Nov 10, 2020 · Monterey Bay

Monterey Bay · Sep – Nov 2020

137 m
Deepest dive
4:15
Longest dive
129
Dives
Sightings
13
Days between first and last sighting
48

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Sep 23, 202096 m15.5°C82 m
Sep 24, 202091 m15.7°C68 m
Sep 25, 2020170 m15.7°C137 m
Sep 26, 2020326 m15.9°C74 m
Sep 27, 2020107 m15.9°C70 m
Oct 3, 2020567 m16.8°C28 m
Oct 7, 2020567 m15.7°C65 m
Oct 10, 2020259 m14.8°C83 m
Oct 12, 2020114 m15.0°C46 m
Oct 15, 202062 m14.8°C55 m
Oct 24, 2020295 m15.2°C45 m
Oct 27, 2020353 m14.7°C35 m
Nov 10, 2020381 m12.9°C21 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
Sep 23, 2020 — seafloor 96 m (measured), deepest dive 82 m (modelled)Sep 23Sep 24, 2020 — seafloor 91 m (measured), deepest dive 68 m (modelled)Sep 25, 2020 — seafloor 170 m (measured), deepest dive 137 m (modelled)Sep 26, 2020 — seafloor 326 m (measured), deepest dive 74 m (modelled)Sep 26Sep 27, 2020 — seafloor 107 m (measured), deepest dive 70 m (modelled)Oct 3, 2020 — seafloor 567 m (measured), deepest dive 28 m (modelled)Oct 7, 2020 — seafloor 567 m (measured), deepest dive 65 m (modelled)Oct 7Oct 10, 2020 — seafloor 259 m (measured), deepest dive 83 m (modelled)Oct 12, 2020 — seafloor 114 m (measured), deepest dive 46 m (modelled)Oct 15, 2020 — seafloor 62 m (measured), deepest dive 55 m (modelled)Oct 15Oct 24, 2020 — seafloor 295 m (measured), deepest dive 45 m (modelled)Oct 27, 2020 — seafloor 353 m (measured), deepest dive 35 m (modelled)Nov 10, 2020 — seafloor 381 m (measured), deepest dive 21 m (modelled)Nov 10

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

Dives

137 m
Deepest dive
4:15
Longest dive
129
Dives
24 m
Avg dive depth
13
Sightings
48
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
075150137 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (170 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 · Sep 25, 2020

measured
Seafloor depth
170 m
Sea-surface temperature
15.7°C
Distance from shore
9.0 km

Across the residency · 13 sightings

measured
Seafloor depth
62 m – 567 m
Sea-surface temperature
12.9°C – 16.8°C
Distance from shore
5.0 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 13 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.