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

Maltease – Residency

10th sighting in Chatham Strait
Fluke of Maltease
Maltease Confirmed in the catalog @16852
Jun 29 – Sep 19, 2021 · Chatham Strait

Chatham Strait · Jun – Sep 2021

65 m
Deepest dive
2:12
Longest dive
55
Dives
Sightings
7
Days between first and last sighting
83

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 29, 202126 m10.9°C15 m
Jul 25, 202193 m12.2°C61 m
Jul 28, 202148 m12.7°C37 m
Aug 1, 202184 m13.9°C32 m
Aug 8, 202120 m15.5°C15 m
Sep 7, 202174 m12.3°C65 m
Sep 19, 2021-252 m10.1°C—

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 29, 2021 — seafloor 26 m (measured), deepest dive 15 m (modelled)Jun 29Jul 25, 2021 — seafloor 93 m (measured), deepest dive 61 m (modelled)Jul 25Jul 28, 2021 — seafloor 48 m (measured), deepest dive 37 m (modelled)Jul 28Aug 1, 2021 — seafloor 84 m (measured), deepest dive 32 m (modelled)Aug 1Aug 8, 2021 — seafloor 20 m (measured), deepest dive 15 m (modelled)Aug 8Sep 7, 2021 — seafloor 74 m (measured), deepest dive 65 m (modelled)Sep 7Sep 19, 2021 — seafloor -252 m (measured), deepest dive — (modelled)Sep 19

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

Dives

65 m
Deepest dive
2:12
Longest dive
55
Dives
18 m
Avg dive depth
7
Sightings
83
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010065 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (74 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 · Sep 7, 2021

measured
Seafloor depth
74 m
Sea-surface temperature
12.3°C
Distance from shore
4.0 km

Across the residency · 7 sightings

measured
Seafloor depth
-252 m – 93 m
Sea-surface temperature
10.1°C – 15.5°C
Distance from shore
1.0 km – 4.0 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.