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Salish Sea

Hemlock – Residency

113th sighting in Salish Sea
Fluke of Hemlock
Hemlock Confirmed in the catalog @5001
Jun 17 – Nov 30, 2025 · Salish Sea

Salish Sea · Jun – Nov 2025

113 m
Deepest dive
3:59
Longest dive
312
Dives
Sightings
25
Days between first and last sighting
166

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 17, 2025169 m11.7°C95 m
Jun 18, 2025153 m12.1°C91 m
Jun 21, 2025120 m12.8°C60 m
Jul 6, 2025129 m12.0°C96 m
Jul 10, 2025108 m12.9°C71 m
Jul 12, 2025165 m17.7°C63 m
Jul 12, 2025135 m17.7°C71 m
Jul 13, 2025148 m18.3°C107 m
Jul 20, 2025128 m14.0°C63 m
Jul 22, 202591 m14.4°C72 m
Jul 24, 202584 m14.7°C24 m
Aug 10, 2025148 m14.4°C92 m
Aug 22, 2025173 m14.2°C51 m
Sep 12, 202555 m15.6°C30 m
Sep 22, 202570 m12.5°C33 m
Sep 22, 20257 m12.4°C5 m
Oct 2, 2025111 m11.6°C43 m
Oct 2, 2025109 m11.5°C45 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 17, 2025 — seafloor 169 m (measured), deepest dive 95 m (modelled)Jun 17Jun 18, 2025 — seafloor 153 m (measured), deepest dive 91 m (modelled)Jun 21, 2025 — seafloor 120 m (measured), deepest dive 60 m (modelled)Jul 6, 2025 — seafloor 129 m (measured), deepest dive 96 m (modelled)Jul 10, 2025 — seafloor 108 m (measured), deepest dive 71 m (modelled)Jul 12, 2025 — seafloor 165 m (measured), deepest dive 63 m (modelled)Jul 12Jul 12, 2025 — seafloor 135 m (measured), deepest dive 71 m (modelled)Jul 13, 2025 — seafloor 148 m (measured), deepest dive 107 m (modelled)Jul 20, 2025 — seafloor 128 m (measured), deepest dive 63 m (modelled)Jul 22, 2025 — seafloor 91 m (measured), deepest dive 72 m (modelled)Jul 24, 2025 — seafloor 84 m (measured), deepest dive 24 m (modelled)Jul 24Aug 10, 2025 — seafloor 148 m (measured), deepest dive 92 m (modelled)Aug 22, 2025 — seafloor 173 m (measured), deepest dive 51 m (modelled)Sep 12, 2025 — seafloor 55 m (measured), deepest dive 30 m (modelled)Sep 22, 2025 — seafloor 70 m (measured), deepest dive 33 m (modelled)Sep 22, 2025 — seafloor 7 m (measured), deepest dive 5 m (modelled)Sep 22Oct 2, 2025 — seafloor 111 m (measured), deepest dive 43 m (modelled)Oct 2, 2025 — seafloor 109 m (measured), deepest dive 45 m (modelled)Oct 3, 2025 — seafloor 8 m (measured), deepest dive 7 m (modelled)Oct 21, 2025 — seafloor 118 m (measured), deepest dive 72 m (modelled)Oct 23, 2025 — seafloor 87 m (measured), deepest dive 42 m (modelled)Oct 23Nov 8, 2025 — seafloor 75 m (measured), deepest dive 67 m (modelled)Nov 8, 2025 — seafloor 122 m (measured), deepest dive 67 m (modelled)Nov 14, 2025 — seafloor 43 m (measured), deepest dive 37 m (modelled)Nov 30, 2025 — seafloor 140 m (measured), deepest dive 113 m (modelled)

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

Dives

113 m
Deepest dive
3:59
Longest dive
312
Dives
23 m
Avg dive depth
25
Sightings
166
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
075150113 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (140 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 · Nov 30, 2025

measured
Seafloor depth
140 m
Sea-surface temperature
10.3°C
Distance from shore
8.0 km

Across the residency · 25 sightings

measured
Seafloor depth
7 m – 173 m
Sea-surface temperature
10.2°C – 18.3°C
Distance from shore
2.0 km – 12.0 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 25 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.