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

HW-MN0804412 – Residency

15th sighting in South Africa
Fluke of HW-MN0804412
HW-MN0804412 Confirmed in the catalog @130257
Dec 9, 2025 – Jan 5, 2026 · South Africa

South Africa · Dec 2025 – Jan 2026

67 m
Deepest dive
2:24
Longest dive
23
Dives
Sightings
4
Days between first and last sighting
27

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Dec 9, 202517 m—13 m
Dec 9, 202529 m—25 m
Dec 11, 202537 m—27 m
Jan 5, 202683 m15.0°C67 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 9, 2025 — seafloor 17 m (measured), deepest dive 13 m (modelled)Dec 9Dec 9, 2025 — seafloor 29 m (measured), deepest dive 25 m (modelled)Dec 9Dec 11, 2025 — seafloor 37 m (measured), deepest dive 27 m (modelled)Dec 11Jan 5, 2026 — seafloor 83 m (measured), deepest dive 67 m (modelled)Jan 5

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

Dives

67 m
Deepest dive
2:24
Longest dive
23
Dives
19 m
Avg dive depth
4
Sightings
27
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010067 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (83 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.

Unlock with Risa Deep

Place

Where this happened · Jan 5, 2026

measured
Seafloor depth
83 m
Sea-surface temperature
15.0°C
Distance from shore
8.0 km

Across the residency · 4 sightings

measured
Seafloor depth
17 m – 83 m
Sea-surface temperature
15.0°C
Distance from shore
1.0 km – 8.0 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).

Happywhale runs on donations: support Happywhale →

Breach is an independent project. It is not affiliated with, nor endorsed by, Happywhale or GBIF.