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

HW-MN0804550 – Residency

5th sighting in South Africa
Fluke of HW-MN0804550
HW-MN0804550 Confirmed in the catalog @132252
Dec 11 – 19, 2024 · South Africa

South Africa · Dec 2024

54 m
Deepest dive
2:26
Longest dive
38
Dives
Sightings
5
Days between first and last sighting
8

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Dec 11, 202460 m—50 m
Dec 12, 202442 m—30 m
Dec 14, 202478 m—54 m
Dec 17, 202477 m—44 m
Dec 19, 202482 m—48 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 11, 2024 — seafloor 60 m (measured), deepest dive 50 m (modelled)Dec 11Dec 12, 2024 — seafloor 42 m (measured), deepest dive 30 m (modelled)Dec 12Dec 14, 2024 — seafloor 78 m (measured), deepest dive 54 m (modelled)Dec 14Dec 17, 2024 — seafloor 77 m (measured), deepest dive 44 m (modelled)Dec 17Dec 19, 2024 — seafloor 82 m (measured), deepest dive 48 m (modelled)Dec 19

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

Dives

54 m
Deepest dive
2:26
Longest dive
38
Dives
23 m
Avg dive depth
5
Sightings
8
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010054 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (78 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 14, 2024

measured
Seafloor depth
78 m
Sea-surface temperature
—
Distance from shore
3.0 km

Across the residency · 5 sightings

measured
Seafloor depth
42 m – 82 m
Sea-surface temperature
—
Distance from shore
2.0 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 5 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.