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

SEAK-5376 – Residency

5th sighting in Chatham Strait
Fluke of SEAK-5376
SEAK-5376 Confirmed in the catalog @60499
Aug 1 – Sep 8, 2026 · Chatham Strait

Chatham Strait, Late Summer

Herring held, I stayed — Chatham Strait knows me well by now.

109 m
Deepest dive
3:00
Longest dive
40
Dives
Sightings
3
Days between first and last sighting
38

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Aug 1, 2026303 m12.9°C109 m
Aug 9, 2026330 m13.5°C60 m
Sep 8, 202674 m14.2°C44 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
Aug 1, 2026 — seafloor 303 m (measured), deepest dive 109 m (modelled)Aug 1Aug 9, 2026 — seafloor 330 m (measured), deepest dive 60 m (modelled)Aug 9Sep 8, 2026 — seafloor 74 m (measured), deepest dive 44 m (modelled)Sep 8

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

Dives

109 m
Deepest dive
3:00
Longest dive
40
Dives
26 m
Avg dive depth
3
Sightings
38
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
075150109 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (303 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 1, 2026

measured
Seafloor depth
303 m
Sea-surface temperature
12.9°C
Distance from shore
3.0 km

Across the residency · 3 sightings

measured
Seafloor depth
74 m – 330 m
Sea-surface temperature
12.9°C – 14.2°C
Distance from shore
1.0 km – 4.0 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 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.