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

Castilleja – Residency

5th sighting in Chatham Strait
Fluke of Castilleja
Castilleja Confirmed in the catalog @5519
Jul 27 – Sep 29, 2025 · Chatham Strait

Chatham Strait · Jul – Sep 2025

76 m
Deepest dive
2:37
Longest dive
24
Dives
Sightings
3
Days between first and last sighting
65

Dive stats modelled within real depth limits — not measured

Get actual dive data with Risa Deep →
SightingSeafloorSea tempDeepest dive (modelled)
Jul 27, 202588 m—76 m
Aug 3, 2025531 m—41 m
Sep 29, 202557 m—42 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
Jul 27, 2025 — seafloor 88 m (measured), deepest dive 76 m (modelled)Jul 27Aug 3, 2025 — seafloor 531 m (measured), deepest dive 41 m (modelled)Aug 3Sep 29, 2025 — seafloor 57 m (measured), deepest dive 42 m (modelled)Sep 29

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

Dives

76 m
Deepest dive
2:37
Longest dive
24
Dives
25 m
Avg dive depth
3
Sightings
65
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
05010076 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (88 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 27, 2025

measured
Seafloor depth
88 m
Sea-surface temperature
—
Distance from shore
2.0 km

Across the residency · 3 sightings

measured
Seafloor depth
57 m – 531 m
Sea-surface temperature
—
Distance from shore
1.0 km – 3.0 km

Sources: GEBCO seafloor grid · PacIOOS coastline distance

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

Source records

This activity is assembled from 3 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.