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

WidowMaker – Residency

19th sighting in Chatham Strait
Fluke of WidowMaker
WidowMaker Confirmed in the catalog @6371
Jun 19 – Aug 5, 2021 · Chatham Strait

Chatham Strait · Jun – Aug 2021

121 m
Deepest dive
4:45
Longest dive
51
Dives
Sightings
5
Days between first and last sighting
47

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Jun 19, 2021140 m11.7°C43 m
Jul 26, 202184 m12.9°C53 m
Aug 5, 202161 m13.8°C52 m
Aug 5, 2021138 m14.1°C121 m
Aug 5, 202188 m13.6°C39 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, 2021 — seafloor 140 m (measured), deepest dive 43 m (modelled)Jun 19Jul 26, 2021 — seafloor 84 m (measured), deepest dive 53 m (modelled)Jul 26Aug 5, 2021 — seafloor 61 m (measured), deepest dive 52 m (modelled)Aug 5Aug 5, 2021 — seafloor 138 m (measured), deepest dive 121 m (modelled)Aug 5Aug 5, 2021 — seafloor 88 m (measured), deepest dive 39 m (modelled)Aug 5

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

Dives

121 m
Deepest dive
4:45
Longest dive
51
Dives
22 m
Avg dive depth
5
Sightings
47
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
075150121 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (138 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.

Unlock with Risa Deep

Place

Where this happened · Aug 5, 2021

measured
Seafloor depth
138 m
Sea-surface temperature
14.1°C
Distance from shore
—

Across the residency · 5 sightings

measured
Seafloor depth
61 m – 140 m
Sea-surface temperature
11.7°C – 14.1°C
Distance from shore
1.0 km – 6.0 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).

Happywhale runs on donations: support Happywhale →

Breach is an independent project. It is not affiliated with, nor endorsed by, Happywhale or GBIF.