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

Defenestration – Residency

18th sighting in Chatham Strait
Fluke of Defenestration
Defenestration Confirmed in the catalog @16924
Jul 25 – Oct 5, 2021 · Chatham Strait

Chatham Strait · Jul – Oct 2021

139 m
Deepest dive
5:22
Longest dive
103
Dives
Sightings
8
Days between first and last sighting
73

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jul 25, 202169 m12.0°C38 m
Jul 25, 2021165 m12.1°C94 m
Jul 25, 2021573 m12.7°C137 m
Jul 26, 2021165 m12.9°C139 m
Jul 27, 202166 m12.7°C51 m
Jul 27, 2021165 m12.7°C83 m
Jul 28, 202148 m12.7°C26 m
Oct 5, 202182 m8.2°C54 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
Jul 25, 2021 — seafloor 69 m (measured), deepest dive 38 m (modelled)Jul 25Jul 25, 2021 — seafloor 165 m (measured), deepest dive 94 m (modelled)Jul 25Jul 25, 2021 — seafloor 573 m (measured), deepest dive 137 m (modelled)Jul 25Jul 26, 2021 — seafloor 165 m (measured), deepest dive 139 m (modelled)Jul 26Jul 27, 2021 — seafloor 66 m (measured), deepest dive 51 m (modelled)Jul 27Jul 27, 2021 — seafloor 165 m (measured), deepest dive 83 m (modelled)Jul 27Jul 28, 2021 — seafloor 48 m (measured), deepest dive 26 m (modelled)Jul 28Oct 5, 2021 — seafloor 82 m (measured), deepest dive 54 m (modelled)Oct 5

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

Dives

139 m
Deepest dive
5:22
Longest dive
103
Dives
26 m
Avg dive depth
8
Sightings
73
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
075150139 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (165 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 26, 2021

measured
Seafloor depth
165 m
Sea-surface temperature
12.9°C
Distance from shore
1.0 km

Across the residency · 8 sightings

measured
Seafloor depth
48 m – 573 m
Sea-surface temperature
8.2°C – 12.9°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 8 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.