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South Africa

HW-MN0805923 – Residency

9th sighting in South Africa
Fluke of HW-MN0805923
HW-MN0805923 Confirmed in the catalog @150838
Dec 29, 2025 – Jan 17, 2026 · South Africa

South Africa · Dec 2025 – Jan 2026

83 m
Deepest dive
2:53
Longest dive
114
Dives
Sightings
9
Days between first and last sighting
19
Deepest dive on record
83 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Dec 29, 202545 m—39 m
Dec 30, 202546 m—42 m
Jan 5, 202682 m14.8°C43 m
Jan 5, 202665 m14.8°C41 m
Jan 6, 202693 m15.2°C55 m
Jan 7, 202692 m17.5°C83 m
Jan 11, 202671 m15.2°C58 m
Jan 12, 202638 m15.1°C28 m
Jan 17, 202685 m14.1°C77 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 29, 2025 — seafloor 45 m (measured), deepest dive 39 m (modelled)Dec 29Dec 30, 2025 — seafloor 46 m (measured), deepest dive 42 m (modelled)Dec 30Jan 5, 2026 — seafloor 82 m (measured), deepest dive 43 m (modelled)Jan 5Jan 5, 2026 — seafloor 65 m (measured), deepest dive 41 m (modelled)Jan 5Jan 6, 2026 — seafloor 93 m (measured), deepest dive 55 m (modelled)Jan 6Jan 7, 2026 — seafloor 92 m (measured), deepest dive 83 m (modelled)Jan 7Jan 11, 2026 — seafloor 71 m (measured), deepest dive 58 m (modelled)Jan 11Jan 12, 2026 — seafloor 38 m (measured), deepest dive 28 m (modelled)Jan 12Jan 17, 2026 — seafloor 85 m (measured), deepest dive 77 m (modelled)Jan 17

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

Dives

83 m
Deepest dive
2:53
Longest dive
114
Dives
21 m
Avg dive depth
9
Sightings
19
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010083 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (92 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 7, 2026

measured
Seafloor depth
92 m
Sea-surface temperature
17.5°C
Distance from shore
5.0 km

Across the residency · 9 sightings

measured
Seafloor depth
38 m – 93 m
Sea-surface temperature
14.1°C – 17.5°C
Distance from shore
3.0 km – 10.0 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 9 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.