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Chatham Strait

Casper – Residency

21st sighting in Chatham Strait
Fluke of Casper
Casper Confirmed in the catalog @26833
Jun 8 – Aug 21, 2023 · Chatham Strait

Chatham Strait · Jun – Aug 2023

132 m
Deepest dive
4:05
Longest dive
116
Dives
Sightings
9
Days between first and last sighting
74

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jun 8, 202373 m9.0°C47 m
Jul 4, 2023171 m11.9°C117 m
Jul 27, 2023556 m13.1°C132 m
Jul 28, 202392 m12.9°C53 m
Jul 29, 202341 m13.5°C22 m
Aug 18, 202335 m11.9°C29 m
Aug 19, 2023221 m11.8°C33 m
Aug 20, 202365 m11.4°C38 m
Aug 21, 202326 m11.3°C21 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 8, 2023 — seafloor 73 m (measured), deepest dive 47 m (modelled)Jun 8Jul 4, 2023 — seafloor 171 m (measured), deepest dive 117 m (modelled)Jul 4Jul 27, 2023 — seafloor 556 m (measured), deepest dive 132 m (modelled)Jul 27Jul 28, 2023 — seafloor 92 m (measured), deepest dive 53 m (modelled)Jul 28Jul 29, 2023 — seafloor 41 m (measured), deepest dive 22 m (modelled)Jul 29Aug 18, 2023 — seafloor 35 m (measured), deepest dive 29 m (modelled)Aug 18Aug 19, 2023 — seafloor 221 m (measured), deepest dive 33 m (modelled)Aug 19Aug 20, 2023 — seafloor 65 m (measured), deepest dive 38 m (modelled)Aug 20Aug 21, 2023 — seafloor 26 m (measured), deepest dive 21 m (modelled)Aug 21

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

Dives

132 m
Deepest dive
4:05
Longest dive
116
Dives
19 m
Avg dive depth
9
Sightings
74
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
075150132 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (556 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 · Jul 27, 2023

measured
Seafloor depth
556 m
Sea-surface temperature
13.1°C
Distance from shore
6.0 km

Across the residency · 9 sightings

measured
Seafloor depth
26 m – 556 m
Sea-surface temperature
9.0°C – 13.5°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 9 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.