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

Darwin – Residency

8th sighting in Chatham Strait
Fluke of Darwin
Darwin Confirmed in the catalog @5304
Jun 18 – Oct 5, 2021 · Chatham Strait

Summer in the Strait

Spent the warm months working my usual waters, same reliable currents.

166 m
Deepest dive
6:15
Longest dive
67
Dives
Sightings
6
Days between first and last sighting
109

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 18, 2021165 m10.7°C95 m
Jul 19, 2021487 m12.8°C53 m
Jul 29, 202181 m13.8°C51 m
Aug 8, 2021116 m15.6°C19 m
Aug 27, 2021239 m12.3°C166 m
Oct 5, 202182 m8.2°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
Jun 18, 2021 — seafloor 165 m (measured), deepest dive 95 m (modelled)Jun 18Jul 19, 2021 — seafloor 487 m (measured), deepest dive 53 m (modelled)Jul 19Jul 29, 2021 — seafloor 81 m (measured), deepest dive 51 m (modelled)Jul 29Aug 8, 2021 — seafloor 116 m (measured), deepest dive 19 m (modelled)Aug 8Aug 27, 2021 — seafloor 239 m (measured), deepest dive 166 m (modelled)Aug 27Oct 5, 2021 — seafloor 82 m (measured), deepest dive 44 m (modelled)Oct 5

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

Dives

166 m
Deepest dive
6:15
Longest dive
67
Dives
25 m
Avg dive depth
6
Sightings
109
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
0100200166 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (239 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 27, 2021

measured
Seafloor depth
239 m
Sea-surface temperature
12.3°C
Distance from shore
2.0 km

Across the residency · 6 sightings

measured
Seafloor depth
81 m – 487 m
Sea-surface temperature
8.2°C – 15.6°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 6 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.