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

HW-MN0804559 – Residency

15th sighting in South Africa
Fluke of HW-MN0804559
HW-MN0804559 Confirmed in the catalog @132272
Dec 27, 2025 – Jan 12, 2026 · South Africa

South Africa · Dec 2025 – Jan 2026

68 m
Deepest dive
2:25
Longest dive
40
Dives
Sightings
4
Days between first and last sighting
16

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Dec 27, 202562 m—47 m
Dec 29, 202545 m—41 m
Jan 2, 202689 m15.6°C68 m
Jan 12, 202638 m15.1°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
Dec 27, 2025 — seafloor 62 m (measured), deepest dive 47 m (modelled)Dec 27Dec 29, 2025 — seafloor 45 m (measured), deepest dive 41 m (modelled)Dec 29Jan 2, 2026 — seafloor 89 m (measured), deepest dive 68 m (modelled)Jan 2Jan 12, 2026 — seafloor 38 m (measured), deepest dive 34 m (modelled)Jan 12

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

Dives

68 m
Deepest dive
2:25
Longest dive
40
Dives
21 m
Avg dive depth
4
Sightings
16
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010068 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (89 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 2, 2026

measured
Seafloor depth
89 m
Sea-surface temperature
15.6°C
Distance from shore
15.0 km

Across the residency · 4 sightings

measured
Seafloor depth
38 m – 89 m
Sea-surface temperature
15.1°C – 15.6°C
Distance from shore
3.0 km – 15.0 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.