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

Cinquefoil – Residency

8th sighting in Chatham Strait
Fluke of Cinquefoil
Cinquefoil Confirmed in the catalog @26658
Jun 14 – Oct 10, 2026 · Chatham Strait

Chatham Strait, all summer

Herring thick, water green, cameras catching me more than once — good stretch.

126 m
Deepest dive
5:07
Longest dive
47
Dives
Sightings
5
Days between first and last sighting
118
Deepest dive on record
126 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 14, 2026100 m10.4°C51 m
Aug 15, 2026107 m14.6°C33 m
Aug 17, 2026145 m14.4°C69 m
Aug 27, 2026104 m13.7°C57 m
Oct 10, 2026142 m—126 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 14, 2026 — seafloor 100 m (measured), deepest dive 51 m (modelled)Jun 14Aug 15, 2026 — seafloor 107 m (measured), deepest dive 33 m (modelled)Aug 15Aug 17, 2026 — seafloor 145 m (measured), deepest dive 69 m (modelled)Aug 17Aug 27, 2026 — seafloor 104 m (measured), deepest dive 57 m (modelled)Aug 27Oct 10, 2026 — seafloor 142 m (measured), deepest dive 126 m (modelled)Oct 10

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

Dives

126 m
Deepest dive
5:07
Longest dive
47
Dives
25 m
Avg dive depth
5
Sightings
118
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
075150126 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (142 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 · Oct 10, 2026

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

Across the residency · 5 sightings

measured
Seafloor depth
100 m – 145 m
Sea-surface temperature
10.4°C – 14.6°C
Distance from shore
1.0 km – 5.0 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 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).

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