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

Kasu – Residency

5th sighting in Troms
Fluke of Kasu
Kasu Confirmed in the catalog @76385
Dec 4 – 12, 2025 · Troms

Troms · Dec 2025

190 m
Deepest dive
5:16
Longest dive
18
Dives
Sightings
2
Days between first and last sighting
9
Deepest dive on record
190 m · this residency

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Dec 4, 2025388 m—190 m
Dec 12, 2025152 m—133 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 4, 2025 — seafloor 388 m (measured), deepest dive 190 m (modelled)Dec 4Dec 12, 2025 — seafloor 152 m (measured), deepest dive 133 m (modelled)Dec 12

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

Dives

190 m
Deepest dive
5:16
Longest dive
18
Dives
40 m
Avg dive depth
2
Sightings
9
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
0100200190 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (388 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 4, 2025

measured
Seafloor depth
388 m
Sea-surface temperature
—
Distance from shore
—

Across the residency · 2 sightings

measured
Seafloor depth
152 m – 388 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.