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Lynn Canal & Stephens Passage

Bullethole – Residency

111th sighting in Lynn Canal & Stephens Passage
Fluke of Bullethole
Bullethole Confirmed in the catalog @26458
May 17 – Dec 1, 2021 · Lynn Canal & Stephens Passage

Long Summer in the Bay

Seven months threading these familiar straits, letting the cold currents carry old stories.

86 m
Deepest dive
3:52
Longest dive
265
Dives
Sightings
20
Days between first and last sighting
198

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
May 17, 202186 m7.0°C79 m
May 27, 202182 m8.1°C21 m
Jul 10, 2021105 m10.7°C52 m
Jul 16, 2021117 m13.1°C82 m
Jul 17, 2021116 m12.9°C86 m
Jul 31, 2021114 m14.7°C49 m
Aug 7, 2021111 m15.6°C77 m
Aug 17, 202172 m13.5°C48 m
Aug 19, 202192 m12.9°C71 m
Aug 26, 202183 m12.2°C69 m
Aug 29, 202190 m11.9°C56 m
Aug 31, 202193 m11.4°C28 m
Sep 1, 2021103 m11.8°C71 m
Sep 21, 202158 m10.8°C43 m
Sep 25, 202184 m9.9°C35 m
Sep 26, 202196 m9.6°C78 m
Sep 29, 202166 m9.1°C54 m
Nov 2, 202167 m6.5°C52 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 17, 2021 — seafloor 86 m (measured), deepest dive 79 m (modelled)May 17May 27, 2021 — seafloor 82 m (measured), deepest dive 21 m (modelled)Jul 10, 2021 — seafloor 105 m (measured), deepest dive 52 m (modelled)Jul 16, 2021 — seafloor 117 m (measured), deepest dive 82 m (modelled)Jul 17, 2021 — seafloor 116 m (measured), deepest dive 86 m (modelled)Jul 17Jul 31, 2021 — seafloor 114 m (measured), deepest dive 49 m (modelled)Aug 7, 2021 — seafloor 111 m (measured), deepest dive 77 m (modelled)Aug 17, 2021 — seafloor 72 m (measured), deepest dive 48 m (modelled)Aug 19, 2021 — seafloor 92 m (measured), deepest dive 71 m (modelled)Aug 19Aug 26, 2021 — seafloor 83 m (measured), deepest dive 69 m (modelled)Aug 29, 2021 — seafloor 90 m (measured), deepest dive 56 m (modelled)Aug 31, 2021 — seafloor 93 m (measured), deepest dive 28 m (modelled)Sep 1, 2021 — seafloor 103 m (measured), deepest dive 71 m (modelled)Sep 1Sep 21, 2021 — seafloor 58 m (measured), deepest dive 43 m (modelled)Sep 25, 2021 — seafloor 84 m (measured), deepest dive 35 m (modelled)Sep 26, 2021 — seafloor 96 m (measured), deepest dive 78 m (modelled)Sep 29, 2021 — seafloor 66 m (measured), deepest dive 54 m (modelled)Sep 29Nov 2, 2021 — seafloor 67 m (measured), deepest dive 52 m (modelled)Nov 29, 2021 — seafloor 13 m (measured), deepest dive 12 m (modelled)Dec 1, 2021 — seafloor 89 m (measured), deepest dive 59 m (modelled)

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

Dives

86 m
Deepest dive
3:52
Longest dive
265
Dives
22 m
Avg dive depth
20
Sightings
198
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010086 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (116 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 17, 2021

measured
Seafloor depth
116 m
Sea-surface temperature
12.9°C
Distance from shore
1.0 km

Across the residency · 20 sightings

measured
Seafloor depth
13 m – 117 m
Sea-surface temperature
4.7°C – 15.6°C
Distance from shore
1.0 km – 2.0 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 20 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.