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Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors
Salish Sea

Big Mama – Residency

124th sighting in Salish Sea
Fluke of Big Mama
Big Mama Confirmed in the catalog @2120
Apr 29 – Oct 5, 2026 · Salish Sea

Spring Return

Back in my favorite corner again, where the currents know exactly how to serve up breakfast.

154 m
Deepest dive
5:51
Longest dive
165
Dives
Sightings
14
Days between first and last sighting
158

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Apr 29, 2026233 m10.7°C98 m
May 1, 202682 m12.8°C34 m
May 4, 202679 m12.2°C53 m
May 5, 202689 m12.0°C61 m
May 14, 2026240 m10.4°C154 m
May 30, 2026177 m13.8°C112 m
Jun 27, 2026161 m13.9°C77 m
Jul 5, 202685 m16.0°C66 m
Jul 6, 202670 m18.0°C60 m
Jul 17, 2026492 m15.7°C53 m
Aug 1, 2026237 m15.4°C62 m
Sep 4, 2026171 m15.6°C73 m
Sep 14, 2026152 m15.0°C47 m
Oct 5, 2026336 m14.4°C82 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
Apr 29, 2026 — seafloor 233 m (measured), deepest dive 98 m (modelled)Apr 29May 1, 2026 — seafloor 82 m (measured), deepest dive 34 m (modelled)May 4, 2026 — seafloor 79 m (measured), deepest dive 53 m (modelled)May 5, 2026 — seafloor 89 m (measured), deepest dive 61 m (modelled)May 5May 14, 2026 — seafloor 240 m (measured), deepest dive 154 m (modelled)May 30, 2026 — seafloor 177 m (measured), deepest dive 112 m (modelled)Jun 27, 2026 — seafloor 161 m (measured), deepest dive 77 m (modelled)Jun 27Jul 5, 2026 — seafloor 85 m (measured), deepest dive 66 m (modelled)Jul 6, 2026 — seafloor 70 m (measured), deepest dive 60 m (modelled)Jul 17, 2026 — seafloor 492 m (measured), deepest dive 53 m (modelled)Jul 17Aug 1, 2026 — seafloor 237 m (measured), deepest dive 62 m (modelled)Sep 4, 2026 — seafloor 171 m (measured), deepest dive 73 m (modelled)Sep 14, 2026 — seafloor 152 m (measured), deepest dive 47 m (modelled)Sep 14Oct 5, 2026 — seafloor 336 m (measured), deepest dive 82 m (modelled)

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

Dives

154 m
Deepest dive
5:51
Longest dive
165
Dives
27 m
Avg dive depth
14
Sightings
158
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
0100200154 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (240 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 · May 14, 2026

measured
Seafloor depth
240 m
Sea-surface temperature
10.4°C
Distance from shore
2.0 km

Across the residency · 14 sightings

measured
Seafloor depth
70 m – 492 m
Sea-surface temperature
10.4°C – 18.0°C
Distance from shore
1.0 km – 9.0 km

Sources: GEBCO seafloor grid · NOAA OISST sea temperature · PacIOOS coastline distance

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

Source records

This activity is assembled from 14 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.