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Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors
Gulf of Maine

Lacuna – Residency

26th sighting in Gulf of Maine
Fluke of Lacuna
Lacuna Confirmed in the catalog @7607
Jun 29 – Oct 12, 2026 · Gulf of Maine

Herring Ledges, Held Steady

Every tide over these ledges, I know exactly where the fish stack up.

105 m
Deepest dive
5:18
Longest dive
140
Dives
Sightings
11
Days between first and last sighting
105

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 29, 202678 m12.2°C59 m
Jul 9, 202641 m14.4°C36 m
Jul 9, 202641 m14.4°C36 m
Jul 10, 2026192 m14.3°C105 m
Aug 1, 202695 m14.5°C83 m
Aug 6, 202615 m14.7°C12 m
Aug 7, 2026107 m15.0°C24 m
Aug 16, 202652 m13.4°C44 m
Aug 21, 202680 m15.3°C44 m
Aug 29, 2026141 m15.2°C21 m
Oct 12, 202627 m—22 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
Jun 29, 2026 — seafloor 78 m (measured), deepest dive 59 m (modelled)Jun 29Jul 9, 2026 — seafloor 41 m (measured), deepest dive 36 m (modelled)Jul 9Jul 9, 2026 — seafloor 41 m (measured), deepest dive 36 m (modelled)Jul 9Jul 10, 2026 — seafloor 192 m (measured), deepest dive 105 m (modelled)Jul 10Aug 1, 2026 — seafloor 95 m (measured), deepest dive 83 m (modelled)Aug 1Aug 6, 2026 — seafloor 15 m (measured), deepest dive 12 m (modelled)Aug 6Aug 7, 2026 — seafloor 107 m (measured), deepest dive 24 m (modelled)Aug 7Aug 16, 2026 — seafloor 52 m (measured), deepest dive 44 m (modelled)Aug 16Aug 21, 2026 — seafloor 80 m (measured), deepest dive 44 m (modelled)Aug 21Aug 29, 2026 — seafloor 141 m (measured), deepest dive 21 m (modelled)Aug 29Oct 12, 2026 — seafloor 27 m (measured), deepest dive 22 m (modelled)Oct 12

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

Dives

105 m
Deepest dive
5:18
Longest dive
140
Dives
19 m
Avg dive depth
11
Sightings
105
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
075150105 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (192 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 · Jul 10, 2026

measured
Seafloor depth
192 m
Sea-surface temperature
14.3°C
Distance from shore
10.0 km

Across the residency · 11 sightings

measured
Seafloor depth
15 m – 192 m
Sea-surface temperature
12.2°C – 15.3°C
Distance from shore
2.0 km – 19.0 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 11 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.