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

HW-MN0804395 – Residency

5th sighting in South Africa
Fluke of HW-MN0804395
HW-MN0804395 Confirmed in the catalog @130146
Dec 30 – 31, 2025 · South Africa

South Africa · Dec 2025

55 m
Deepest dive
2:12
Longest dive
27
Dives
Sightings
3
Days between first and last sighting
1
Deepest dive on record
55 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Dec 30, 202562 m—55 m
Dec 30, 202546 m—36 m
Dec 31, 202545 m—37 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 30, 2025 — seafloor 62 m (measured), deepest dive 55 m (modelled)Dec 30Dec 30, 2025 — seafloor 46 m (measured), deepest dive 36 m (modelled)Dec 30Dec 31, 2025 — seafloor 45 m (measured), deepest dive 37 m (modelled)Dec 31

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

Dives

55 m
Deepest dive
2:12
Longest dive
27
Dives
18 m
Avg dive depth
3
Sightings
1
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010055 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (62 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 · Dec 30, 2025

measured
Seafloor depth
62 m
Sea-surface temperature
—
Distance from shore
9.0 km

Across the residency · 3 sightings

measured
Seafloor depth
45 m – 62 m
Sea-surface temperature
—
Distance from shore
3.0 km – 9.0 km

Sources: GEBCO seafloor grid · PacIOOS coastline distance

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

Source records

This activity is assembled from 3 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.