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

LadyJ – Residency

20th sighting in Chatham Strait
Fluke of LadyJ
LadyJ Confirmed in the catalog @14711
May 28 – Aug 11, 2025 · Chatham Strait

Chatham Strait · May – Aug 2025

111 m
Deepest dive
3:54
Longest dive
62
Dives
Sightings
6
Days between first and last sighting
75

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
May 28, 2025333 m7.9°C83 m
Jun 14, 2025103 m9.9°C42 m
Jun 20, 2025187 m11.4°C74 m
Jun 30, 2025370 m11.8°C94 m
Jul 25, 202588 m12.7°C78 m
Aug 11, 2025187 m13.7°C111 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
May 28, 2025 — seafloor 333 m (measured), deepest dive 83 m (modelled)May 28Jun 14, 2025 — seafloor 103 m (measured), deepest dive 42 m (modelled)Jun 14Jun 20, 2025 — seafloor 187 m (measured), deepest dive 74 m (modelled)Jun 20Jun 30, 2025 — seafloor 370 m (measured), deepest dive 94 m (modelled)Jun 30Jul 25, 2025 — seafloor 88 m (measured), deepest dive 78 m (modelled)Jul 25Aug 11, 2025 — seafloor 187 m (measured), deepest dive 111 m (modelled)Aug 11

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

Dives

111 m
Deepest dive
3:54
Longest dive
62
Dives
31 m
Avg dive depth
6
Sightings
75
Days first → last

Dive metrics are modelled within real depth limits — not measured

Get actual dive data with Risa Deep →

Dive profile

modelled
075150111 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (187 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 · Aug 11, 2025

measured
Seafloor depth
187 m
Sea-surface temperature
13.7°C
Distance from shore
1.0 km

Across the residency · 6 sightings

measured
Seafloor depth
88 m – 370 m
Sea-surface temperature
7.9°C – 13.7°C
Distance from shore
1.0 km – 2.0 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 6 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.