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

Sandelwood – Residency

12th sighting in Chatham Strait
Fluke of Sandelwood
Sandelwood Confirmed in the catalog @6444
Jun 18 – Sep 6, 2026 · Chatham Strait

Chatham Strait, All Summer

Deep green water, good company, exactly where I want to be.

191 m
Deepest dive
5:19
Longest dive
79
Dives
Sightings
5
Days between first and last sighting
80
Deepest dive on record
191 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 18, 2026113 m10.0°C67 m
Jul 4, 2026383 m11.3°C108 m
Jul 16, 2026204 m13.0°C84 m
Aug 10, 2026242 m14.2°C191 m
Sep 6, 202657 m12.9°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
Jun 18, 2026 — seafloor 113 m (measured), deepest dive 67 m (modelled)Jun 18Jul 4, 2026 — seafloor 383 m (measured), deepest dive 108 m (modelled)Jul 4Jul 16, 2026 — seafloor 204 m (measured), deepest dive 84 m (modelled)Jul 16Aug 10, 2026 — seafloor 242 m (measured), deepest dive 191 m (modelled)Aug 10Sep 6, 2026 — seafloor 57 m (measured), deepest dive 44 m (modelled)Sep 6

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

Dives

191 m
Deepest dive
5:19
Longest dive
79
Dives
32 m
Avg dive depth
5
Sightings
80
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
0100200191 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (242 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 10, 2026

measured
Seafloor depth
242 m
Sea-surface temperature
14.2°C
Distance from shore
1.0 km

Across the residency · 5 sightings

measured
Seafloor depth
57 m – 383 m
Sea-surface temperature
10.0°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 5 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.