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

HW-MN0804590 – Residency

9th sighting in South Africa
Fluke of HW-MN0804590
HW-MN0804590 Confirmed in the catalog @132316
Dec 19, 2024 – Feb 21, 2025 · South Africa

South Africa · Dec 2024 – Feb 2025

60 m
Deepest dive
2:32
Longest dive
83
Dives
Sightings
9
Days between first and last sighting
64

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Dec 19, 202482 m—49 m
Jan 8, 202565 m—49 m
Jan 9, 202586 m—57 m
Jan 18, 202554 m—47 m
Jan 19, 202563 m—29 m
Feb 8, 202538 m—32 m
Feb 12, 202561 m—36 m
Feb 20, 202549 m—45 m
Feb 21, 202566 m—60 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 19, 2024 — seafloor 82 m (measured), deepest dive 49 m (modelled)Dec 19Jan 8, 2025 — seafloor 65 m (measured), deepest dive 49 m (modelled)Jan 8Jan 9, 2025 — seafloor 86 m (measured), deepest dive 57 m (modelled)Jan 9Jan 18, 2025 — seafloor 54 m (measured), deepest dive 47 m (modelled)Jan 18Jan 19, 2025 — seafloor 63 m (measured), deepest dive 29 m (modelled)Jan 19Feb 8, 2025 — seafloor 38 m (measured), deepest dive 32 m (modelled)Feb 8Feb 12, 2025 — seafloor 61 m (measured), deepest dive 36 m (modelled)Feb 12Feb 20, 2025 — seafloor 49 m (measured), deepest dive 45 m (modelled)Feb 20Feb 21, 2025 — seafloor 66 m (measured), deepest dive 60 m (modelled)Feb 21

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

Dives

60 m
Deepest dive
2:32
Longest dive
83
Dives
19 m
Avg dive depth
9
Sightings
64
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010060 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (66 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 21, 2025

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

Across the residency · 9 sightings

measured
Seafloor depth
38 m – 86 m
Sea-surface temperature
—
Distance from shore
3.0 km – 17.0 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 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.