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

Halo – Residency

27th sighting in Clarence Strait
Fluke of Halo
Halo Confirmed in the catalog @24665
Aug 25 – Sep 17, 2026 · Clarence Strait

Chatham Strait, Counted Again

Kelp-dark water, good company, no ceremony needed to feel right here.

38 m
Deepest dive
1:58
Longest dive
38
Dives
Sightings
4
Days between first and last sighting
23

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Aug 25, 202610 m14.6°C8 m
Aug 26, 20264 m14.0°C4 m
Aug 27, 202642 m14.5°C33 m
Sep 17, 202659 m11.5°C38 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 25, 2026 — seafloor 10 m (measured), deepest dive 8 m (modelled)Aug 25Aug 26, 2026 — seafloor 4 m (measured), deepest dive 4 m (modelled)Aug 26Aug 27, 2026 — seafloor 42 m (measured), deepest dive 33 m (modelled)Aug 27Sep 17, 2026 — seafloor 59 m (measured), deepest dive 38 m (modelled)Sep 17

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

Dives

38 m
Deepest dive
1:58
Longest dive
38
Dives
12 m
Avg dive depth
4
Sightings
23
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
0255038 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (59 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 17, 2026

measured
Seafloor depth
59 m
Sea-surface temperature
11.5°C
Distance from shore
1.0 km

Across the residency · 4 sightings

measured
Seafloor depth
4 m – 59 m
Sea-surface temperature
11.5°C – 14.6°C
Distance from shore
1.0 km – 3.0 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 4 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.