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

SEAK-5444 – Residency

6th sighting in Chatham Strait
Fluke of SEAK-5444
SEAK-5444 Confirmed in the catalog @15177
May 31 – Jul 7, 2026 · Chatham Strait

Chatham Strait, Early Summer

Green water, thin light, this strait knows my fluke by heart.

141 m
Deepest dive
8:08
Longest dive
37
Dives
Sightings
4
Days between first and last sighting
36
Deepest dive on record
141 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
May 31, 2026272 m8.5°C122 m
Jun 12, 2026178 m9.7°C131 m
Jun 25, 2026338 m11.8°C76 m
Jul 7, 2026409 m12.2°C141 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
May 31, 2026 — seafloor 272 m (measured), deepest dive 122 m (modelled)May 31Jun 12, 2026 — seafloor 178 m (measured), deepest dive 131 m (modelled)Jun 12Jun 25, 2026 — seafloor 338 m (measured), deepest dive 76 m (modelled)Jun 25Jul 7, 2026 — seafloor 409 m (measured), deepest dive 141 m (modelled)Jul 7

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

Dives

141 m
Deepest dive
8:08
Longest dive
37
Dives
46 m
Avg dive depth
4
Sightings
36
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
075150141 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (409 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 7, 2026

measured
Seafloor depth
409 m
Sea-surface temperature
12.2°C
Distance from shore
5.0 km

Across the residency · 4 sightings

measured
Seafloor depth
178 m – 409 m
Sea-surface temperature
8.5°C – 12.2°C
Distance from shore
3.0 km – 5.0 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.