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Monterey Bay

Lefty – Residency

167th sighting in Monterey Bay
Fluke of Lefty
Lefty Confirmed in the catalog @934
May 29 – Oct 27, 2025 · Monterey Bay

Summer in the Bay

Five months in my favorite feeding spot, missing flipper and all.

129 m
Deepest dive
5:04
Longest dive
167
Dives
Sightings
14
Days between first and last sighting
151

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
May 29, 2025226 m13.9°C129 m
Jun 1, 202580 m14.0°C29 m
Jun 2, 202571 m14.0°C46 m
Jun 12, 202555 m14.4°C46 m
Jun 12, 202557 m14.4°C50 m
Jun 13, 202558 m14.5°C50 m
Jun 14, 202571 m14.6°C47 m
Jun 14, 202555 m14.6°C39 m
Jun 15, 2025146 m14.1°C111 m
Jun 15, 202557 m14.0°C49 m
Sep 11, 202564 m17.2°C58 m
Sep 13, 202599 m16.8°C39 m
Sep 15, 202565 m16.9°C52 m
Oct 27, 2025641 m15.1°C93 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 29, 2025 — seafloor 226 m (measured), deepest dive 129 m (modelled)May 29Jun 1, 2025 — seafloor 80 m (measured), deepest dive 29 m (modelled)Jun 2, 2025 — seafloor 71 m (measured), deepest dive 46 m (modelled)Jun 12, 2025 — seafloor 55 m (measured), deepest dive 46 m (modelled)Jun 12Jun 12, 2025 — seafloor 57 m (measured), deepest dive 50 m (modelled)Jun 13, 2025 — seafloor 58 m (measured), deepest dive 50 m (modelled)Jun 14, 2025 — seafloor 71 m (measured), deepest dive 47 m (modelled)Jun 14Jun 14, 2025 — seafloor 55 m (measured), deepest dive 39 m (modelled)Jun 15, 2025 — seafloor 146 m (measured), deepest dive 111 m (modelled)Jun 15, 2025 — seafloor 57 m (measured), deepest dive 49 m (modelled)Jun 15Sep 11, 2025 — seafloor 64 m (measured), deepest dive 58 m (modelled)Sep 13, 2025 — seafloor 99 m (measured), deepest dive 39 m (modelled)Sep 15, 2025 — seafloor 65 m (measured), deepest dive 52 m (modelled)Sep 15Oct 27, 2025 — seafloor 641 m (measured), deepest dive 93 m (modelled)

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

Dives

129 m
Deepest dive
5:04
Longest dive
167
Dives
25 m
Avg dive depth
14
Sightings
151
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
075150129 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (226 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 29, 2025

measured
Seafloor depth
226 m
Sea-surface temperature
13.9°C
Distance from shore
11.0 km

Across the residency · 14 sightings

measured
Seafloor depth
55 m – 641 m
Sea-surface temperature
13.9°C – 17.2°C
Distance from shore
2.0 km – 13.0 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 14 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.