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

HW-MN0804404 – Residency

15th sighting in South Africa
Fluke of HW-MN0804404
HW-MN0804404 Confirmed in the catalog @130158
Dec 21, 2025 – Jan 12, 2026 · South Africa

South Africa · Dec 2025 – Jan 2026

64 m
Deepest dive
3:19
Longest dive
74
Dives
Sightings
7
Days between first and last sighting
22

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Dec 21, 202564 m—57 m
Dec 21, 202584 m—35 m
Dec 28, 202581 m—64 m
Dec 28, 202561 m—55 m
Dec 29, 202545 m—35 m
Dec 30, 202546 m—36 m
Jan 12, 202638 m15.1°C22 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 21, 2025 — seafloor 64 m (measured), deepest dive 57 m (modelled)Dec 21Dec 21, 2025 — seafloor 84 m (measured), deepest dive 35 m (modelled)Dec 21Dec 28, 2025 — seafloor 81 m (measured), deepest dive 64 m (modelled)Dec 28Dec 28, 2025 — seafloor 61 m (measured), deepest dive 55 m (modelled)Dec 28Dec 29, 2025 — seafloor 45 m (measured), deepest dive 35 m (modelled)Dec 29Dec 30, 2025 — seafloor 46 m (measured), deepest dive 36 m (modelled)Dec 30Jan 12, 2026 — seafloor 38 m (measured), deepest dive 22 m (modelled)Jan 12

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

Dives

64 m
Deepest dive
3:19
Longest dive
74
Dives
20 m
Avg dive depth
7
Sightings
22
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010064 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (81 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 28, 2025

measured
Seafloor depth
81 m
Sea-surface temperature
—
Distance from shore
10.0 km

Across the residency · 7 sightings

measured
Seafloor depth
38 m – 84 m
Sea-surface temperature
15.1°C
Distance from shore
3.0 km – 10.0 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.