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

HW-MN0804820 – Residency

4th sighting in South Africa
Fluke of HW-MN0804820
HW-MN0804820 Confirmed in the catalog @133053
Jan 4 – 25, 2025 · South Africa

South Africa · Jan 2025

59 m
Deepest dive
2:43
Longest dive
33
Dives
Sightings
4
Days between first and last sighting
21

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jan 4, 202578 m—58 m
Jan 8, 202562 m—51 m
Jan 24, 202550 m—19 m
Jan 25, 202569 m—59 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
Jan 4, 2025 — seafloor 78 m (measured), deepest dive 58 m (modelled)Jan 4Jan 8, 2025 — seafloor 62 m (measured), deepest dive 51 m (modelled)Jan 8Jan 24, 2025 — seafloor 50 m (measured), deepest dive 19 m (modelled)Jan 24Jan 25, 2025 — seafloor 69 m (measured), deepest dive 59 m (modelled)Jan 25

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

Dives

59 m
Deepest dive
2:43
Longest dive
33
Dives
19 m
Avg dive depth
4
Sightings
21
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010059 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (69 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 · Jan 25, 2025

measured
Seafloor depth
69 m
Sea-surface temperature
—
Distance from shore
8.0 km

Across the residency · 4 sightings

measured
Seafloor depth
50 m – 78 m
Sea-surface temperature
—
Distance from shore
4.0 km – 12.0 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 4 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.