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

Maltease – Residency

22nd sighting in Chatham Strait
Fluke of Maltease
Maltease Confirmed in the catalog @16852
Mar 24 – Aug 7, 2023 · Chatham Strait

Chatham Strait · Mar – Aug 2023

78 m
Deepest dive
3:00
Longest dive
121
Dives
Sightings
7
Days between first and last sighting
135

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Mar 24, 202365 m4.5°C50 m
Apr 30, 202335 m5.6°C32 m
May 8, 2023192 m7.3°C78 m
Jun 9, 202346 m9.2°C38 m
Jun 21, 202344 m9.8°C31 m
Jul 27, 2023556 m13.1°C61 m
Aug 7, 202374 m12.4°C55 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
Mar 24, 2023 — seafloor 65 m (measured), deepest dive 50 m (modelled)Mar 24Apr 30, 2023 — seafloor 35 m (measured), deepest dive 32 m (modelled)Apr 30May 8, 2023 — seafloor 192 m (measured), deepest dive 78 m (modelled)May 8Jun 9, 2023 — seafloor 46 m (measured), deepest dive 38 m (modelled)Jun 9Jun 21, 2023 — seafloor 44 m (measured), deepest dive 31 m (modelled)Jun 21Jul 27, 2023 — seafloor 556 m (measured), deepest dive 61 m (modelled)Jul 27Aug 7, 2023 — seafloor 74 m (measured), deepest dive 55 m (modelled)Aug 7

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

Dives

78 m
Deepest dive
3:00
Longest dive
121
Dives
20 m
Avg dive depth
7
Sightings
135
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010078 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (192 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 · May 8, 2023

measured
Seafloor depth
192 m
Sea-surface temperature
7.3°C
Distance from shore
3.0 km

Across the residency · 7 sightings

measured
Seafloor depth
35 m – 556 m
Sea-surface temperature
4.5°C – 13.1°C
Distance from shore
1.0 km – 6.0 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 7 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.