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

MRIWU-00173 – Residency

13th sighting in South Africa
Fluke of MRIWU-00173
MRIWU-00173 Confirmed in the catalog @128838
Nov 25, 2024 – Feb 20, 2025 · South Africa

South Africa · Nov 2024 – Feb 2025

55 m
Deepest dive
2:34
Longest dive
120
Dives
Sightings
13
Days between first and last sighting
87

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Nov 25, 202469 m—28 m
Nov 29, 202493 m—36 m
Dec 11, 202460 m—30 m
Dec 12, 202441 m—31 m
Dec 14, 202478 m—54 m
Dec 15, 202479 m—42 m
Dec 29, 202456 m—44 m
Dec 31, 202477 m—55 m
Jan 22, 2025141 m—42 m
Jan 23, 202558 m—39 m
Feb 8, 202556 m—41 m
Feb 19, 202544 m—39 m
Feb 20, 202549 m—42 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
Nov 25, 2024 — seafloor 69 m (measured), deepest dive 28 m (modelled)Nov 25Nov 29, 2024 — seafloor 93 m (measured), deepest dive 36 m (modelled)Dec 11, 2024 — seafloor 60 m (measured), deepest dive 30 m (modelled)Dec 12, 2024 — seafloor 41 m (measured), deepest dive 31 m (modelled)Dec 12Dec 14, 2024 — seafloor 78 m (measured), deepest dive 54 m (modelled)Dec 15, 2024 — seafloor 79 m (measured), deepest dive 42 m (modelled)Dec 29, 2024 — seafloor 56 m (measured), deepest dive 44 m (modelled)Dec 29Dec 31, 2024 — seafloor 77 m (measured), deepest dive 55 m (modelled)Jan 22, 2025 — seafloor 141 m (measured), deepest dive 42 m (modelled)Jan 23, 2025 — seafloor 58 m (measured), deepest dive 39 m (modelled)Jan 23Feb 8, 2025 — seafloor 56 m (measured), deepest dive 41 m (modelled)Feb 19, 2025 — seafloor 44 m (measured), deepest dive 39 m (modelled)Feb 20, 2025 — seafloor 49 m (measured), deepest dive 42 m (modelled)Feb 20

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

Dives

55 m
Deepest dive
2:34
Longest dive
120
Dives
20 m
Avg dive depth
13
Sightings
87
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010055 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.

Unlock with Risa Deep

Place

Where this happened · Dec 31, 2024

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

Across the residency · 13 sightings

measured
Seafloor depth
41 m – 141 m
Sea-surface temperature
—
Distance from shore
2.0 km – 18.0 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 13 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.