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Chatham Strait

Polinahe – Residency

58th sighting in Chatham Strait
Fluke of Polinahe
Polinahe Confirmed in the catalog @5462
Jun 29 – Aug 26, 2025 · Chatham Strait

Chatham Strait · Jun – Aug 2025

88 m
Deepest dive
2:56
Longest dive
84
Dives
Sightings
10
Days between first and last sighting
58

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 29, 202594 m12.3°C64 m
Jul 5, 2025165 m11.5°C68 m
Jul 17, 20254 m12.0°C3 m
Jul 21, 202515 m12.9°C11 m
Jul 24, 202598 m13.6°C88 m
Jul 25, 202547 m12.7°C35 m
Aug 1, 202522 m14.1°C19 m
Aug 15, 202535 m13.9°C30 m
Aug 24, 202586 m15.1°C44 m
Aug 26, 202536 m14.7°C30 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 29, 2025 — seafloor 94 m (measured), deepest dive 64 m (modelled)Jun 29Jul 5, 2025 — seafloor 165 m (measured), deepest dive 68 m (modelled)Jul 5Jul 17, 2025 — seafloor 4 m (measured), deepest dive 3 m (modelled)Jul 17Jul 21, 2025 — seafloor 15 m (measured), deepest dive 11 m (modelled)Jul 21Jul 24, 2025 — seafloor 98 m (measured), deepest dive 88 m (modelled)Jul 24Jul 25, 2025 — seafloor 47 m (measured), deepest dive 35 m (modelled)Jul 25Aug 1, 2025 — seafloor 22 m (measured), deepest dive 19 m (modelled)Aug 1Aug 15, 2025 — seafloor 35 m (measured), deepest dive 30 m (modelled)Aug 15Aug 24, 2025 — seafloor 86 m (measured), deepest dive 44 m (modelled)Aug 24Aug 26, 2025 — seafloor 36 m (measured), deepest dive 30 m (modelled)Aug 26

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

Dives

88 m
Deepest dive
2:56
Longest dive
84
Dives
18 m
Avg dive depth
10
Sightings
58
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010088 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (98 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 24, 2025

measured
Seafloor depth
98 m
Sea-surface temperature
13.6°C
Distance from shore
4.0 km

Across the residency · 10 sightings

measured
Seafloor depth
4 m – 165 m
Sea-surface temperature
11.5°C – 15.1°C
Distance from shore
1.0 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 10 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.