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Sitka Sound & Outer Baranof

Circumbinary – Residency

7th sighting in Sitka Sound & Outer Baranof
Fluke of Circumbinary
Circumbinary Confirmed in the catalog @15637
Jun 24 – Aug 28, 2026 · Sitka Sound & Outer Baranof

Chatham Strait, All Summer Long

Herring stacked up, cameras clicking, this channel just keeps giving.

99 m
Deepest dive
3:40
Longest dive
98
Dives
Sightings
8
Days between first and last sighting
65

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 24, 202678 m11.6°C39 m
Jun 25, 202671 m11.8°C38 m
Jun 26, 202678 m11.9°C65 m
Jul 1, 2026104 m11.7°C93 m
Jul 2, 2026116 m11.8°C70 m
Jul 7, 2026124 m11.9°C99 m
Jul 8, 202678 m11.8°C63 m
Aug 28, 2026100 m14.0°C50 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 24, 2026 — seafloor 78 m (measured), deepest dive 39 m (modelled)Jun 24Jun 25, 2026 — seafloor 71 m (measured), deepest dive 38 m (modelled)Jun 25Jun 26, 2026 — seafloor 78 m (measured), deepest dive 65 m (modelled)Jun 26Jul 1, 2026 — seafloor 104 m (measured), deepest dive 93 m (modelled)Jul 1Jul 2, 2026 — seafloor 116 m (measured), deepest dive 70 m (modelled)Jul 2Jul 7, 2026 — seafloor 124 m (measured), deepest dive 99 m (modelled)Jul 7Jul 8, 2026 — seafloor 78 m (measured), deepest dive 63 m (modelled)Jul 8Aug 28, 2026 — seafloor 100 m (measured), deepest dive 50 m (modelled)Aug 28

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

Dives

99 m
Deepest dive
3:40
Longest dive
98
Dives
23 m
Avg dive depth
8
Sightings
65
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010099 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (124 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 · Jul 7, 2026

measured
Seafloor depth
124 m
Sea-surface temperature
11.9°C
Distance from shore
6.0 km

Across the residency · 8 sightings

measured
Seafloor depth
71 m – 124 m
Sea-surface temperature
11.6°C – 14.0°C
Distance from shore
5.0 km – 7.0 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 8 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.