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South Africa

MRIWU-00173 – Residency

23rd sighting in South Africa
Fluke of MRIWU-00173
MRIWU-00173 Confirmed in the catalog @128838
Dec 27, 2025 – Jan 30, 2026 · South Africa

South Africa · Dec 2025 – Jan 2026

59 m
Deepest dive
2:13
Longest dive
69
Dives
Sightings
10
Days between first and last sighting
34
Deepest dive on record
59 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Dec 27, 2025105 m—56 m
Dec 29, 202558 m—53 m
Dec 29, 202545 m—36 m
Dec 30, 202546 m—12 m
Dec 30, 202562 m—25 m
Jan 11, 202671 m15.2°C59 m
Jan 14, 202637 m15.7°C21 m
Jan 17, 202685 m14.1°C34 m
Jan 29, 202662 m14.7°C44 m
Jan 30, 202634 m14.6°C28 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
Dec 27, 2025 — seafloor 105 m (measured), deepest dive 56 m (modelled)Dec 27Dec 29, 2025 — seafloor 58 m (measured), deepest dive 53 m (modelled)Dec 29Dec 29, 2025 — seafloor 45 m (measured), deepest dive 36 m (modelled)Dec 29Dec 30, 2025 — seafloor 46 m (measured), deepest dive 12 m (modelled)Dec 30Dec 30, 2025 — seafloor 62 m (measured), deepest dive 25 m (modelled)Dec 30Jan 11, 2026 — seafloor 71 m (measured), deepest dive 59 m (modelled)Jan 11Jan 14, 2026 — seafloor 37 m (measured), deepest dive 21 m (modelled)Jan 14Jan 17, 2026 — seafloor 85 m (measured), deepest dive 34 m (modelled)Jan 17Jan 29, 2026 — seafloor 62 m (measured), deepest dive 44 m (modelled)Jan 29Jan 30, 2026 — seafloor 34 m (measured), deepest dive 28 m (modelled)Jan 30

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

Dives

59 m
Deepest dive
2:13
Longest dive
69
Dives
18 m
Avg dive depth
10
Sightings
34
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010059 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (71 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 · Jan 11, 2026

measured
Seafloor depth
71 m
Sea-surface temperature
15.2°C
Distance from shore
5.0 km

Across the residency · 10 sightings

measured
Seafloor depth
34 m – 105 m
Sea-surface temperature
14.1°C – 15.7°C
Distance from shore
3.0 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 10 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.