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

HW-MN0805817 – Residency

11th sighting in South Africa
Fluke of HW-MN0805817
HW-MN0805817 Confirmed in the catalog @150464
Dec 29, 2025 – Feb 7, 2026 · South Africa

South Africa · Dec 2025 – Feb 2026

75 m
Deepest dive
2:44
Longest dive
154
Dives
Sightings
11
Days between first and last sighting
40
Deepest dive on record
75 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Dec 29, 202545 m—30 m
Dec 30, 202562 m—52 m
Dec 30, 202546 m—39 m
Dec 31, 202545 m—40 m
Jan 2, 202682 m15.6°C64 m
Jan 5, 202682 m14.8°C52 m
Jan 6, 202693 m15.2°C57 m
Jan 26, 202669 m14.3°C59 m
Jan 30, 202634 m14.6°C31 m
Feb 7, 202683 m16.8°C75 m
Feb 7, 202682 m16.8°C36 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 30 m (modelled)Dec 29Dec 30, 2025 — seafloor 62 m (measured), deepest dive 52 m (modelled)Dec 30Dec 30, 2025 — seafloor 46 m (measured), deepest dive 39 m (modelled)Dec 30Dec 31, 2025 — seafloor 45 m (measured), deepest dive 40 m (modelled)Dec 31Jan 2, 2026 — seafloor 82 m (measured), deepest dive 64 m (modelled)Jan 2Jan 5, 2026 — seafloor 82 m (measured), deepest dive 52 m (modelled)Jan 5Jan 6, 2026 — seafloor 93 m (measured), deepest dive 57 m (modelled)Jan 6Jan 26, 2026 — seafloor 69 m (measured), deepest dive 59 m (modelled)Jan 26Jan 30, 2026 — seafloor 34 m (measured), deepest dive 31 m (modelled)Jan 30Feb 7, 2026 — seafloor 83 m (measured), deepest dive 75 m (modelled)Feb 7Feb 7, 2026 — seafloor 82 m (measured), deepest dive 36 m (modelled)Feb 7

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

Dives

75 m
Deepest dive
2:44
Longest dive
154
Dives
22 m
Avg dive depth
11
Sightings
40
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010075 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (83 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 · Feb 7, 2026

measured
Seafloor depth
83 m
Sea-surface temperature
16.8°C
Distance from shore
5.0 km

Across the residency · 11 sightings

measured
Seafloor depth
34 m – 93 m
Sea-surface temperature
14.3°C – 16.8°C
Distance from shore
3.0 km – 12.0 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 11 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.