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

Quarternote – Residency

17th sighting in Gulf of Maine
Fluke of Quarternote
Quarternote Confirmed in the catalog @19685
Jun 27 – Aug 16, 2025 · Gulf of Maine

Gulf of Maine · Jun – Aug 2025

128 m
Deepest dive
6:15
Longest dive
86
Dives
Sightings
5
Days between first and last sighting
50

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 27, 2025121 m—95 m
Aug 7, 202551 m—40 m
Aug 7, 202590 m—60 m
Aug 15, 2025177 m—128 m
Aug 16, 202595 m—75 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 27, 2025 — seafloor 121 m (measured), deepest dive 95 m (modelled)Jun 27Aug 7, 2025 — seafloor 51 m (measured), deepest dive 40 m (modelled)Aug 7Aug 7, 2025 — seafloor 90 m (measured), deepest dive 60 m (modelled)Aug 7Aug 15, 2025 — seafloor 177 m (measured), deepest dive 128 m (modelled)Aug 15Aug 16, 2025 — seafloor 95 m (measured), deepest dive 75 m (modelled)Aug 16

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

Dives

128 m
Deepest dive
6:15
Longest dive
86
Dives
28 m
Avg dive depth
5
Sightings
50
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
075150128 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (177 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, 2025

measured
Seafloor depth
177 m
Sea-surface temperature
—
Distance from shore
22.0 km

Across the residency · 5 sightings

measured
Seafloor depth
51 m – 177 m
Sea-surface temperature
—
Distance from shore
5.0 km – 22.0 km

Sources: GEBCO seafloor grid · PacIOOS coastline distance

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

Source records

This activity is assembled from 5 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.