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

GWAK-P360 – Residency

8th sighting in Prince William Sound
Fluke of GWAK-P360
GWAK-P360 Confirmed in the catalog @26987
Sep 11 – 13, 2026 · Prince William Sound

Herring Season, Home Water

Autumn herring thick enough to feel, and I know every fjord that holds it.

59 m
Deepest dive
1:32
Longest dive
17
Dives
Sightings
3
Days between first and last sighting
2

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Sep 11, 2026220 m—59 m
Sep 12, 2026116 m—28 m
Sep 13, 2026267 m—39 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 11, 2026 — seafloor 220 m (measured), deepest dive 59 m (modelled)Sep 11Sep 12, 2026 — seafloor 116 m (measured), deepest dive 28 m (modelled)Sep 12Sep 13, 2026 — seafloor 267 m (measured), deepest dive 39 m (modelled)Sep 13

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

Dives

59 m
Deepest dive
1:32
Longest dive
17
Dives
18 m
Avg dive depth
3
Sightings
2
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010059 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (220 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 11, 2026

measured
Seafloor depth
220 m
Sea-surface temperature
—
Distance from shore
—

Across the residency · 3 sightings

measured
Seafloor depth
116 m – 267 m
Sea-surface temperature
—
Distance from shore
1.0 km – 3.0 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 3 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.