Risa
Try Deep freeDeep
Risa
Try Deep freeDeep
Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors
Salish Sea

Big Mama – Residency

97th sighting in Salish Sea
Fluke of Big Mama
Big Mama Confirmed in the catalog @2120
Apr 17 – Aug 26, 2024 · Salish Sea

Summer in familiar waters

Four months of perfect krill runs kept me close to home.

176 m
Deepest dive
5:46
Longest dive
134
Dives
Sightings
15
Days between first and last sighting
131

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Apr 17, 2024258 m8.7°C166 m
Apr 25, 2024164 m9.7°C47 m
May 2, 202464 m9.3°C46 m
May 6, 2024100 m10.0°C63 m
May 20, 202446 m9.9°C27 m
Jun 16, 2024157 m10.1°C57 m
Jun 19, 202498 m11.3°C61 m
Jun 23, 2024121 m17.5°C31 m
Jun 28, 2024194 m13.8°C176 m
Jul 2, 2024133 m15.3°C60 m
Jul 25, 2024247 m18.4°C97 m
Aug 3, 2024278 m19.4°C49 m
Aug 4, 2024275 m19.5°C41 m
Aug 13, 202431 m21.0°C11 m
Aug 26, 2024150 m16.5°C71 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 17, 2024 — seafloor 258 m (measured), deepest dive 166 m (modelled)Apr 17Apr 25, 2024 — seafloor 164 m (measured), deepest dive 47 m (modelled)May 2, 2024 — seafloor 64 m (measured), deepest dive 46 m (modelled)May 6, 2024 — seafloor 100 m (measured), deepest dive 63 m (modelled)May 6May 20, 2024 — seafloor 46 m (measured), deepest dive 27 m (modelled)Jun 16, 2024 — seafloor 157 m (measured), deepest dive 57 m (modelled)Jun 19, 2024 — seafloor 98 m (measured), deepest dive 61 m (modelled)Jun 19Jun 23, 2024 — seafloor 121 m (measured), deepest dive 31 m (modelled)Jun 28, 2024 — seafloor 194 m (measured), deepest dive 176 m (modelled)Jul 2, 2024 — seafloor 133 m (measured), deepest dive 60 m (modelled)Jul 2Jul 25, 2024 — seafloor 247 m (measured), deepest dive 97 m (modelled)Aug 3, 2024 — seafloor 278 m (measured), deepest dive 49 m (modelled)Aug 4, 2024 — seafloor 275 m (measured), deepest dive 41 m (modelled)Aug 4Aug 13, 2024 — seafloor 31 m (measured), deepest dive 11 m (modelled)Aug 26, 2024 — seafloor 150 m (measured), deepest dive 71 m (modelled)

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

Dives

176 m
Deepest dive
5:46
Longest dive
134
Dives
27 m
Avg dive depth
15
Sightings
131
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
0100200176 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (194 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.

Unlock with Risa Deep

Place

Where this happened · Jun 28, 2024

measured
Seafloor depth
194 m
Sea-surface temperature
13.8°C
Distance from shore
3.0 km

Across the residency · 15 sightings

measured
Seafloor depth
31 m – 278 m
Sea-surface temperature
8.7°C – 21.0°C
Distance from shore
1.0 km – 14.0 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 15 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).

Happywhale runs on donations: support Happywhale →

Breach is an independent project. It is not affiliated with, nor endorsed by, Happywhale or GBIF.