Risa
Try Deep freeDeep
Risa
Try Deep freeDeep
Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors
Lynn Canal & Stephens Passage

MommasBoy – Residency

23rd sighting in Lynn Canal & Stephens Passage
Fluke of MommasBoy
MommasBoy Confirmed in the catalog @16812
May 11 – Aug 6, 2023 · Lynn Canal & Stephens Passage

Lynn Canal & Stephens Passage · May – Aug 2023

102 m
Deepest dive
3:46
Longest dive
271
Dives
Sightings
24
Days between first and last sighting
87

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
May 11, 20238 m7.3°C7 m
Jun 22, 2023229 m11.4°C102 m
Jun 22, 2023306 m11.5°C39 m
Jul 6, 202376 m13.1°C69 m
Jul 9, 202372 m13.7°C32 m
Jul 10, 202372 m13.8°C41 m
Jul 11, 202369 m13.4°C54 m
Jul 13, 202361 m14.5°C56 m
Jul 14, 202362 m15.0°C51 m
Jul 15, 202364 m14.9°C49 m
Jul 16, 202382 m15.0°C36 m
Jul 18, 202372 m15.3°C60 m
Jul 20, 202352 m15.0°C47 m
Jul 20, 2023131 m14.9°C85 m
Jul 21, 2023157 m15.1°C86 m
Jul 23, 202384 m14.6°C38 m
Jul 24, 202337 m14.6°C31 m
Jul 25, 202395 m14.6°C80 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 11, 2023 — seafloor 8 m (measured), deepest dive 7 m (modelled)May 11Jun 22, 2023 — seafloor 229 m (measured), deepest dive 102 m (modelled)Jun 22, 2023 — seafloor 306 m (measured), deepest dive 39 m (modelled)Jul 6, 2023 — seafloor 76 m (measured), deepest dive 69 m (modelled)Jul 9, 2023 — seafloor 72 m (measured), deepest dive 32 m (modelled)Jul 9Jul 10, 2023 — seafloor 72 m (measured), deepest dive 41 m (modelled)Jul 11, 2023 — seafloor 69 m (measured), deepest dive 54 m (modelled)Jul 13, 2023 — seafloor 61 m (measured), deepest dive 56 m (modelled)Jul 14, 2023 — seafloor 62 m (measured), deepest dive 51 m (modelled)Jul 14Jul 15, 2023 — seafloor 64 m (measured), deepest dive 49 m (modelled)Jul 16, 2023 — seafloor 82 m (measured), deepest dive 36 m (modelled)Jul 18, 2023 — seafloor 72 m (measured), deepest dive 60 m (modelled)Jul 20, 2023 — seafloor 52 m (measured), deepest dive 47 m (modelled)Jul 20Jul 20, 2023 — seafloor 131 m (measured), deepest dive 85 m (modelled)Jul 21, 2023 — seafloor 157 m (measured), deepest dive 86 m (modelled)Jul 23, 2023 — seafloor 84 m (measured), deepest dive 38 m (modelled)Jul 24, 2023 — seafloor 37 m (measured), deepest dive 31 m (modelled)Jul 24Jul 25, 2023 — seafloor 95 m (measured), deepest dive 80 m (modelled)Jul 27, 2023 — seafloor 116 m (measured), deepest dive 83 m (modelled)Jul 28, 2023 — seafloor 72 m (measured), deepest dive 15 m (modelled)Jul 29, 2023 — seafloor 46 m (measured), deepest dive 23 m (modelled)Jul 29Jul 29, 2023 — seafloor 64 m (measured), deepest dive 47 m (modelled)Jul 30, 2023 — seafloor 42 m (measured), deepest dive 35 m (modelled)Aug 6, 2023 — seafloor 41 m (measured), deepest dive 35 m (modelled)

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

Dives

102 m
Deepest dive
3:46
Longest dive
271
Dives
22 m
Avg dive depth
24
Sightings
87
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
075150102 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (229 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 22, 2023

measured
Seafloor depth
229 m
Sea-surface temperature
11.4°C
Distance from shore
1.0 km

Across the residency · 24 sightings

measured
Seafloor depth
8 m – 306 m
Sea-surface temperature
7.3°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 24 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.