Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors
Madagascar & Mascarenes

Alia – Residency

2nd sighting in Madagascar & Mascarenes
Fluke of Alia
Alia Confirmed in the catalog @94434
Sep 12 – 23, 2022 · Madagascar & Mascarenes

Madagascar & Mascarenes · Sep 2022

97 m
Deepest dive
3:37
Longest dive
41
Dives
Sightings
2
Days between first and last sighting
11
Deepest dive on record
97 m · this residency

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Sep 12, 202286 m—68 m
Sep 23, 20221,034 m—97 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
Sep 12, 2022 — seafloor 86 m (measured), deepest dive 68 m (modelled)Sep 12Sep 23, 2022 — seafloor 1,034 m (measured), deepest dive 97 m (modelled)Sep 23

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

Dives

97 m
Deepest dive
3:37
Longest dive
41
Dives
26 m
Avg dive depth
2
Sightings
11
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010097 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (1,034 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 · Sep 23, 2022

measured
Seafloor depth
1,034 m
Sea-surface temperature
—
Distance from shore
—

Across the residency · 2 sightings

measured
Seafloor depth
86 m – 1,034 m
Sea-surface temperature
—
Distance from shore
—

Sources: GEBCO seafloor grid

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

Source records

This activity is assembled from 2 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.