Risa
Try Deep freeDeep
Risa
Try Deep freeDeep
Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors
Chatham Strait

Casper – Residency

30th sighting in Chatham Strait
Fluke of Casper
Casper Confirmed in the catalog @26833
Jun 20 – Aug 7, 2024 · Chatham Strait

Chatham Strait · Jun – Aug 2024

118 m
Deepest dive
4:40
Longest dive
102
Dives
Sightings
10
Days between first and last sighting
47

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Jun 20, 202477 m10.8°C64 m
Jun 30, 202451 m11.3°C43 m
Jul 3, 202462 m10.3°C56 m
Jul 3, 202447 m10.3°C42 m
Jul 4, 2024620 m10.5°C109 m
Jul 13, 2024322 m12.6°C37 m
Jul 22, 2024305 m13.1°C118 m
Aug 1, 2024107 m12.3°C75 m
Aug 3, 2024165 m12.9°C99 m
Aug 7, 2024135 m14.4°C88 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 20, 2024 — seafloor 77 m (measured), deepest dive 64 m (modelled)Jun 20Jun 30, 2024 — seafloor 51 m (measured), deepest dive 43 m (modelled)Jun 30Jul 3, 2024 — seafloor 62 m (measured), deepest dive 56 m (modelled)Jul 3Jul 3, 2024 — seafloor 47 m (measured), deepest dive 42 m (modelled)Jul 3Jul 4, 2024 — seafloor 620 m (measured), deepest dive 109 m (modelled)Jul 4Jul 13, 2024 — seafloor 322 m (measured), deepest dive 37 m (modelled)Jul 13Jul 22, 2024 — seafloor 305 m (measured), deepest dive 118 m (modelled)Jul 22Aug 1, 2024 — seafloor 107 m (measured), deepest dive 75 m (modelled)Aug 1Aug 3, 2024 — seafloor 165 m (measured), deepest dive 99 m (modelled)Aug 3Aug 7, 2024 — seafloor 135 m (measured), deepest dive 88 m (modelled)Aug 7

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

Dives

118 m
Deepest dive
4:40
Longest dive
102
Dives
29 m
Avg dive depth
10
Sightings
47
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
075150118 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (305 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 · Jul 22, 2024

measured
Seafloor depth
305 m
Sea-surface temperature
13.1°C
Distance from shore
2.0 km

Across the residency · 10 sightings

measured
Seafloor depth
47 m – 620 m
Sea-surface temperature
10.3°C – 14.4°C
Distance from shore
1.0 km – 8.0 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 10 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.