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

SEAK-5214 – Residency

12th sighting in Chatham Strait
Fluke of SEAK-5214
SEAK-5214 Confirmed in the catalog @10965
May 6 – Jun 29, 2026 · Chatham Strait

Chatham Strait, Right on Cue

Ice-fed water again this early summer, and I'm hugging every inch of shoreline.

74 m
Deepest dive
2:41
Longest dive
18
Dives
Sightings
3
Days between first and last sighting
54

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
May 6, 2026400 m7.4°C67 m
Jun 27, 2026200 m11.8°C74 m
Jun 29, 2026182 m11.8°C33 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
May 6, 2026 — seafloor 400 m (measured), deepest dive 67 m (modelled)May 6Jun 27, 2026 — seafloor 200 m (measured), deepest dive 74 m (modelled)Jun 27Jun 29, 2026 — seafloor 182 m (measured), deepest dive 33 m (modelled)Jun 29

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

Dives

74 m
Deepest dive
2:41
Longest dive
18
Dives
27 m
Avg dive depth
3
Sightings
54
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010074 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (200 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 · Jun 27, 2026

measured
Seafloor depth
200 m
Sea-surface temperature
11.8°C
Distance from shore
1.0 km

Across the residency · 3 sightings

measured
Seafloor depth
182 m – 400 m
Sea-surface temperature
7.4°C – 11.8°C
Distance from shore
1.0 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 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.