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

HW-MN0805615 – Residency

7th sighting in South Africa
Fluke of HW-MN0805615
HW-MN0805615 Confirmed in the catalog @148961
Nov 28, 2025 – Jan 18, 2026 · South Africa

South Africa · Nov 2025 – Jan 2026

63 m
Deepest dive
2:35
Longest dive
81
Dives
Sightings
7
Days between first and last sighting
51
Deepest dive on record
63 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Nov 28, 202523 m—19 m
Dec 9, 202533 m—27 m
Dec 10, 202548 m—43 m
Dec 11, 202579 m—19 m
Dec 18, 202579 m—63 m
Jan 17, 202663 m17.9°C50 m
Jan 18, 202684 m18.2°C35 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
Nov 28, 2025 — seafloor 23 m (measured), deepest dive 19 m (modelled)Nov 28Dec 9, 2025 — seafloor 33 m (measured), deepest dive 27 m (modelled)Dec 9Dec 10, 2025 — seafloor 48 m (measured), deepest dive 43 m (modelled)Dec 10Dec 11, 2025 — seafloor 79 m (measured), deepest dive 19 m (modelled)Dec 11Dec 18, 2025 — seafloor 79 m (measured), deepest dive 63 m (modelled)Dec 18Jan 17, 2026 — seafloor 63 m (measured), deepest dive 50 m (modelled)Jan 17Jan 18, 2026 — seafloor 84 m (measured), deepest dive 35 m (modelled)Jan 18

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

Dives

63 m
Deepest dive
2:35
Longest dive
81
Dives
17 m
Avg dive depth
7
Sightings
51
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010063 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (79 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 18, 2025

measured
Seafloor depth
79 m
Sea-surface temperature
—
Distance from shore
2.0 km

Across the residency · 7 sightings

measured
Seafloor depth
23 m – 84 m
Sea-surface temperature
17.9°C – 18.2°C
Distance from shore
2.0 km – 6.0 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 7 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.