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

Marguerite – Residency

5th sighting in Chatham Strait
Fluke of Marguerite
Marguerite Confirmed in the catalog @6351
Aug 20 – Sep 22, 2021 · Chatham Strait

Chatham Strait · Aug – Sep 2021

96 m
Deepest dive
2:32
Longest dive
20
Dives
Sightings
3
Days between first and last sighting
33

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Aug 20, 2021111 m—96 m
Aug 21, 202163 m—36 m
Sep 22, 202134 m—23 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 20, 2021 — seafloor 111 m (measured), deepest dive 96 m (modelled)Aug 20Aug 21, 2021 — seafloor 63 m (measured), deepest dive 36 m (modelled)Aug 21Sep 22, 2021 — seafloor 34 m (measured), deepest dive 23 m (modelled)Sep 22

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

Dives

96 m
Deepest dive
2:32
Longest dive
20
Dives
20 m
Avg dive depth
3
Sightings
33
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010096 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (111 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 20, 2021

measured
Seafloor depth
111 m
Sea-surface temperature
—
Distance from shore
4.0 km

Across the residency · 3 sightings

measured
Seafloor depth
34 m – 111 m
Sea-surface temperature
—
Distance from shore
2.0 km – 4.0 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).

Happywhale runs on donations: support Happywhale →

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