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

SEAK-5170 – Residency

10th sighting in Chatham Strait
Fluke of SEAK-5170
SEAK-5170 Confirmed in the catalog @26937
Jun 19 – Sep 30, 2025 · Chatham Strait

Chatham Strait · Jun – Sep 2025

81 m
Deepest dive
3:00
Longest dive
73
Dives
Sightings
7
Days between first and last sighting
103

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 19, 2025124 m10.4°C44 m
Jul 13, 2025217 m12.8°C62 m
Jul 17, 20254 m12.0°C3 m
Jul 28, 202588 m13.1°C81 m
Sep 28, 202551 m12.3°C40 m
Sep 29, 202566 m11.7°C41 m
Sep 30, 202586 m11.4°C68 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, 2025 — seafloor 124 m (measured), deepest dive 44 m (modelled)Jun 19Jul 13, 2025 — seafloor 217 m (measured), deepest dive 62 m (modelled)Jul 13Jul 17, 2025 — seafloor 4 m (measured), deepest dive 3 m (modelled)Jul 17Jul 28, 2025 — seafloor 88 m (measured), deepest dive 81 m (modelled)Jul 28Sep 28, 2025 — seafloor 51 m (measured), deepest dive 40 m (modelled)Sep 28Sep 29, 2025 — seafloor 66 m (measured), deepest dive 41 m (modelled)Sep 29Sep 30, 2025 — seafloor 86 m (measured), deepest dive 68 m (modelled)Sep 30

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

Dives

81 m
Deepest dive
3:00
Longest dive
73
Dives
22 m
Avg dive depth
7
Sightings
103
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010081 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (88 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 28, 2025

measured
Seafloor depth
88 m
Sea-surface temperature
13.1°C
Distance from shore
2.0 km

Across the residency · 7 sightings

measured
Seafloor depth
4 m – 217 m
Sea-surface temperature
10.4°C – 13.1°C
Distance from shore
1.0 km – 3.0 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 7 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.