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

Rocker – Residency

12th sighting in Gulf of Maine
Fluke of Rocker
Rocker Confirmed in the catalog @17095
Jun 19 – Jul 12, 2026 · Gulf of Maine

Home Water, Early Summer

These ledges know my belly better than I know my own fins.

34 m
Deepest dive
1:53
Longest dive
53
Dives
Sightings
4
Days between first and last sighting
23

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 19, 202625 m16.0°C20 m
Jun 19, 202644 m16.3°C34 m
Jun 27, 202627 m17.9°C24 m
Jul 12, 202625 m20.2°C18 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 19, 2026 — seafloor 25 m (measured), deepest dive 20 m (modelled)Jun 19Jun 19, 2026 — seafloor 44 m (measured), deepest dive 34 m (modelled)Jun 19Jun 27, 2026 — seafloor 27 m (measured), deepest dive 24 m (modelled)Jun 27Jul 12, 2026 — seafloor 25 m (measured), deepest dive 18 m (modelled)Jul 12

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

Dives

34 m
Deepest dive
1:53
Longest dive
53
Dives
13 m
Avg dive depth
4
Sightings
23
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
0255034 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (44 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 · Jun 19, 2026

measured
Seafloor depth
44 m
Sea-surface temperature
16.3°C
Distance from shore
13.0 km

Across the residency · 4 sightings

measured
Seafloor depth
25 m – 44 m
Sea-surface temperature
16.0°C – 20.2°C
Distance from shore
11.0 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 4 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.