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

HW-MN0804755 – Residency

4th sighting in South Africa
Fluke of HW-MN0804755
HW-MN0804755 Confirmed in the catalog @132957
Dec 31, 2024 – Feb 19, 2025 · South Africa

South Africa · Dec 2024 – Feb 2025

65 m
Deepest dive
2:15
Longest dive
33
Dives
Sightings
4
Days between first and last sighting
50

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Dec 31, 202477 m—65 m
Jan 18, 202552 m—26 m
Jan 25, 202569 m—60 m
Feb 19, 202544 m—31 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 31, 2024 — seafloor 77 m (measured), deepest dive 65 m (modelled)Dec 31Jan 18, 2025 — seafloor 52 m (measured), deepest dive 26 m (modelled)Jan 18Jan 25, 2025 — seafloor 69 m (measured), deepest dive 60 m (modelled)Jan 25Feb 19, 2025 — seafloor 44 m (measured), deepest dive 31 m (modelled)Feb 19

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

Dives

65 m
Deepest dive
2:15
Longest dive
33
Dives
21 m
Avg dive depth
4
Sightings
50
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010065 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (77 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 · Dec 31, 2024

measured
Seafloor depth
77 m
Sea-surface temperature
—
Distance from shore
16.0 km

Across the residency · 4 sightings

measured
Seafloor depth
44 m – 77 m
Sea-surface temperature
—
Distance from shore
3.0 km – 16.0 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.