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

HW-MN0806173 – Residency

4th sighting in South Africa
Fluke of HW-MN0806173
HW-MN0806173 Confirmed in the catalog @151987
Feb 7 – 13, 2026 · South Africa

South Africa · Feb 2026

61 m
Deepest dive
2:32
Longest dive
41
Dives
Sightings
4
Days between first and last sighting
6
Deepest dive on record
61 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Feb 7, 202681 m16.8°C61 m
Feb 10, 202678 m16.2°C34 m
Feb 10, 202674 m16.2°C39 m
Feb 13, 202658 m13.9°C34 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
Feb 7, 2026 — seafloor 81 m (measured), deepest dive 61 m (modelled)Feb 7Feb 10, 2026 — seafloor 78 m (measured), deepest dive 34 m (modelled)Feb 10Feb 10, 2026 — seafloor 74 m (measured), deepest dive 39 m (modelled)Feb 10Feb 13, 2026 — seafloor 58 m (measured), deepest dive 34 m (modelled)Feb 13

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

Dives

61 m
Deepest dive
2:32
Longest dive
41
Dives
18 m
Avg dive depth
4
Sightings
6
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010061 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 · Feb 7, 2026

measured
Seafloor depth
81 m
Sea-surface temperature
16.8°C
Distance from shore
4.0 km

Across the residency · 4 sightings

measured
Seafloor depth
58 m – 81 m
Sea-surface temperature
13.9°C – 16.8°C
Distance from shore
2.0 km – 5.0 km

Sources: GEBCO seafloor grid · NOAA OISST sea temperature · 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.