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Chatham Strait

Twyla – Residency

54th sighting in Chatham Strait
Fluke of Twyla
Twyla Confirmed in the catalog @6414
Apr 30 – Jul 29, 2023 · Chatham Strait

Chatham Strait · Apr – Jul 2023

86 m
Deepest dive
3:29
Longest dive
247
Dives
Sightings
20
Days between first and last sighting
90

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Apr 30, 202335 m5.6°C24 m
May 1, 202362 m5.9°C48 m
Jun 2, 202341 m8.7°C35 m
Jun 3, 202385 m8.6°C58 m
Jun 8, 202367 m9.0°C45 m
Jun 9, 202336 m9.2°C31 m
Jun 21, 2023136 m9.8°C86 m
Jul 5, 202383 m10.9°C42 m
Jul 8, 2023111 m11.9°C65 m
Jul 11, 2023111 m11.8°C73 m
Jul 11, 202357 m12.0°C45 m
Jul 12, 202360 m12.1°C54 m
Jul 14, 202364 m13.1°C58 m
Jul 14, 202342 m13.0°C22 m
Jul 15, 202366 m13.0°C25 m
Jul 17, 202388 m12.0°C43 m
Jul 20, 202350 m11.7°C45 m
Jul 24, 202359 m12.2°C45 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
Apr 30, 2023 — seafloor 35 m (measured), deepest dive 24 m (modelled)Apr 30May 1, 2023 — seafloor 62 m (measured), deepest dive 48 m (modelled)Jun 2, 2023 — seafloor 41 m (measured), deepest dive 35 m (modelled)Jun 3, 2023 — seafloor 85 m (measured), deepest dive 58 m (modelled)Jun 8, 2023 — seafloor 67 m (measured), deepest dive 45 m (modelled)Jun 8Jun 9, 2023 — seafloor 36 m (measured), deepest dive 31 m (modelled)Jun 21, 2023 — seafloor 136 m (measured), deepest dive 86 m (modelled)Jul 5, 2023 — seafloor 83 m (measured), deepest dive 42 m (modelled)Jul 8, 2023 — seafloor 111 m (measured), deepest dive 65 m (modelled)Jul 8Jul 11, 2023 — seafloor 111 m (measured), deepest dive 73 m (modelled)Jul 11, 2023 — seafloor 57 m (measured), deepest dive 45 m (modelled)Jul 12, 2023 — seafloor 60 m (measured), deepest dive 54 m (modelled)Jul 14, 2023 — seafloor 64 m (measured), deepest dive 58 m (modelled)Jul 14Jul 14, 2023 — seafloor 42 m (measured), deepest dive 22 m (modelled)Jul 15, 2023 — seafloor 66 m (measured), deepest dive 25 m (modelled)Jul 17, 2023 — seafloor 88 m (measured), deepest dive 43 m (modelled)Jul 20, 2023 — seafloor 50 m (measured), deepest dive 45 m (modelled)Jul 20Jul 24, 2023 — seafloor 59 m (measured), deepest dive 45 m (modelled)Jul 28, 2023 — seafloor 92 m (measured), deepest dive 77 m (modelled)Jul 29, 2023 — seafloor 39 m (measured), deepest dive 27 m (modelled)

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

Dives

86 m
Deepest dive
3:29
Longest dive
247
Dives
20 m
Avg dive depth
20
Sightings
90
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010086 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (136 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 · Jun 21, 2023

measured
Seafloor depth
136 m
Sea-surface temperature
9.8°C
Distance from shore
2.0 km

Across the residency · 20 sightings

measured
Seafloor depth
35 m – 136 m
Sea-surface temperature
5.6°C – 13.5°C
Distance from shore
1.0 km – 5.0 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 20 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.