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

Melancholy – Residency

19th sighting in Chatham Strait
Fluke of Melancholy
Melancholy Confirmed in the catalog @5311
Jun 30 – Sep 14, 2024 · Chatham Strait

Chatham Strait · Jun – Sep 2024

85 m
Deepest dive
4:40
Longest dive
28
Dives
Sightings
4
Days between first and last sighting
76

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Jun 30, 202457 m11.3°C19 m
Jul 7, 2024110 m10.7°C49 m
Sep 11, 2024160 m12.4°C85 m
Sep 14, 2024141 m12.1°C59 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
Jun 30, 2024 — seafloor 57 m (measured), deepest dive 19 m (modelled)Jun 30Jul 7, 2024 — seafloor 110 m (measured), deepest dive 49 m (modelled)Jul 7Sep 11, 2024 — seafloor 160 m (measured), deepest dive 85 m (modelled)Sep 11Sep 14, 2024 — seafloor 141 m (measured), deepest dive 59 m (modelled)Sep 14

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

Dives

85 m
Deepest dive
4:40
Longest dive
28
Dives
28 m
Avg dive depth
4
Sightings
76
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010085 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (160 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 11, 2024

measured
Seafloor depth
160 m
Sea-surface temperature
12.4°C
Distance from shore
1.0 km

Across the residency · 4 sightings

measured
Seafloor depth
57 m – 160 m
Sea-surface temperature
10.7°C – 12.4°C
Distance from shore
1.0 km – 7.0 km

Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · 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).

Happywhale runs on donations: support Happywhale →

Breach is an independent project. It is not affiliated with, nor endorsed by, Happywhale or GBIF.