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

Mathew – Residency

5th sighting in Chatham Strait
Fluke of Mathew
Mathew Confirmed in the catalog @23761
Aug 29 – Sep 9, 2022 · Chatham Strait

Chatham Strait · Aug – Sep 2022

88 m
Deepest dive
3:44
Longest dive
57
Dives
Sightings
3
Days between first and last sighting
11

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Aug 29, 2022158 m—79 m
Aug 31, 2022107 m—78 m
Sep 9, 2022252 m—88 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
Aug 29, 2022 — seafloor 158 m (measured), deepest dive 79 m (modelled)Aug 29Aug 31, 2022 — seafloor 107 m (measured), deepest dive 78 m (modelled)Aug 31Sep 9, 2022 — seafloor 252 m (measured), deepest dive 88 m (modelled)Sep 9

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

Dives

88 m
Deepest dive
3:44
Longest dive
57
Dives
32 m
Avg dive depth
3
Sightings
11
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 (252 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 · Sep 9, 2022

measured
Seafloor depth
252 m
Sea-surface temperature
—
Distance from shore
1.0 km

Across the residency · 3 sightings

measured
Seafloor depth
107 m – 252 m
Sea-surface temperature
—
Distance from shore
1.0 km – 2.0 km

Sources: GEBCO seafloor grid · PacIOOS coastline distance

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

Source records

This activity is assembled from 3 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.