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Lynn Canal & Stephens Passage

Defenestration – Residency

30th sighting in Lynn Canal & Stephens Passage
Fluke of Defenestration
Defenestration Confirmed in the catalog @16924
Mar 27 – Sep 21, 2026 · Lynn Canal & Stephens Passage

Icy Strait, Every Season

Years of showing up here, herring never once let me down.

197 m
Deepest dive
7:22
Longest dive
511
Dives
Sightings
49
Days between first and last sighting
177
Deepest dive on record
197 m · this residency

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Mar 27, 202662 m4.9°C41 m
Jun 11, 2026112 m10.4°C51 m
Jul 8, 202672 m12.1°C57 m
Jul 23, 2026295 m13.4°C78 m
Jul 26, 2026143 m13.1°C71 m
Jul 27, 2026115 m13.0°C73 m
Jul 28, 2026395 m13.4°C38 m
Jul 29, 202659 m13.2°C44 m
Jul 30, 202674 m13.1°C59 m
Jul 31, 202678 m13.0°C70 m
Aug 1, 202616 m13.3°C13 m
Aug 2, 202658 m13.7°C26 m
Aug 3, 202664 m13.7°C42 m
Aug 4, 202696 m13.9°C61 m
Aug 5, 202672 m14.0°C25 m
Aug 6, 202686 m14.0°C55 m
Aug 7, 2026124 m13.8°C55 m
Aug 8, 202680 m13.6°C69 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
Mar 27, 2026 — seafloor 62 m (measured), deepest dive 41 m (modelled)Mar 27Jun 11, 2026 — seafloor 112 m (measured), deepest dive 51 m (modelled)Jul 8, 2026 — seafloor 72 m (measured), deepest dive 57 m (modelled)Jul 23, 2026 — seafloor 295 m (measured), deepest dive 78 m (modelled)Jul 26, 2026 — seafloor 143 m (measured), deepest dive 71 m (modelled)Jul 27, 2026 — seafloor 115 m (measured), deepest dive 73 m (modelled)Jul 28, 2026 — seafloor 395 m (measured), deepest dive 38 m (modelled)Jul 29, 2026 — seafloor 59 m (measured), deepest dive 44 m (modelled)Jul 30, 2026 — seafloor 74 m (measured), deepest dive 59 m (modelled)Jul 31, 2026 — seafloor 78 m (measured), deepest dive 70 m (modelled)Jul 31Aug 1, 2026 — seafloor 16 m (measured), deepest dive 13 m (modelled)Aug 2, 2026 — seafloor 58 m (measured), deepest dive 26 m (modelled)Aug 3, 2026 — seafloor 64 m (measured), deepest dive 42 m (modelled)Aug 4, 2026 — seafloor 96 m (measured), deepest dive 61 m (modelled)Aug 5, 2026 — seafloor 72 m (measured), deepest dive 25 m (modelled)Aug 6, 2026 — seafloor 86 m (measured), deepest dive 55 m (modelled)Aug 7, 2026 — seafloor 124 m (measured), deepest dive 55 m (modelled)Aug 8, 2026 — seafloor 80 m (measured), deepest dive 69 m (modelled)Aug 9, 2026 — seafloor 87 m (measured), deepest dive 53 m (modelled)Aug 9Aug 10, 2026 — seafloor 77 m (measured), deepest dive 59 m (modelled)Aug 11, 2026 — seafloor 88 m (measured), deepest dive 36 m (modelled)Aug 12, 2026 — seafloor 92 m (measured), deepest dive 67 m (modelled)Aug 13, 2026 — seafloor 80 m (measured), deepest dive 46 m (modelled)Aug 14, 2026 — seafloor 98 m (measured), deepest dive 42 m (modelled)Aug 15, 2026 — seafloor 89 m (measured), deepest dive 81 m (modelled)Aug 16, 2026 — seafloor 89 m (measured), deepest dive 35 m (modelled)Aug 17, 2026 — seafloor 113 m (measured), deepest dive 83 m (modelled)Aug 18, 2026 — seafloor 81 m (measured), deepest dive 61 m (modelled)Aug 18Aug 19, 2026 — seafloor 92 m (measured), deepest dive 30 m (modelled)Aug 20, 2026 — seafloor 128 m (measured), deepest dive 80 m (modelled)Aug 22, 2026 — seafloor 105 m (measured), deepest dive 61 m (modelled)Aug 25, 2026 — seafloor 74 m (measured), deepest dive 53 m (modelled)Aug 25, 2026 — seafloor 130 m (measured), deepest dive 105 m (modelled)Aug 27, 2026 — seafloor 128 m (measured), deepest dive 116 m (modelled)Aug 29, 2026 — seafloor 78 m (measured), deepest dive 36 m (modelled)Aug 30, 2026 — seafloor 87 m (measured), deepest dive 35 m (modelled)Aug 30, 2026 — seafloor 133 m (measured), deepest dive 98 m (modelled)Aug 30Aug 31, 2026 — seafloor 241 m (measured), deepest dive 104 m (modelled)Sep 3, 2026 — seafloor 241 m (measured), deepest dive 197 m (modelled)Sep 4, 2026 — seafloor 43 m (measured), deepest dive 29 m (modelled)Sep 6, 2026 — seafloor 139 m (measured), deepest dive 25 m (modelled)Sep 8, 2026 — seafloor 132 m (measured), deepest dive 73 m (modelled)Sep 9, 2026 — seafloor 93 m (measured), deepest dive 57 m (modelled)Sep 10, 2026 — seafloor 146 m (measured), deepest dive 61 m (modelled)Sep 11, 2026 — seafloor 61 m (measured), deepest dive 53 m (modelled)Sep 12, 2026 — seafloor 62 m (measured), deepest dive 33 m (modelled)Sep 12Sep 13, 2026 — seafloor 22 m (measured), deepest dive 18 m (modelled)Sep 14, 2026 — seafloor 95 m (measured), deepest dive 76 m (modelled)Sep 21, 2026 — seafloor 83 m (measured), deepest dive 68 m (modelled)

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

Dives

197 m
Deepest dive
7:22
Longest dive
511
Dives
25 m
Avg dive depth
49
Sightings
177
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
0100200197 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (241 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 3, 2026

measured
Seafloor depth
241 m
Sea-surface temperature
13.3°C
Distance from shore
6.0 km

Across the residency · 49 sightings

measured
Seafloor depth
16 m – 395 m
Sea-surface temperature
4.9°C – 15.7°C
Distance from shore
1.0 km – 6.0 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 49 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.