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Gulf of Maine

Arcus – Residency

21st sighting in Gulf of Maine
Fluke of Arcus
Arcus Confirmed in the catalog @25263
May 1 – Jul 25, 2026 · Gulf of Maine

Showing Her The Shelf

Watched my calf learn the sandbanks that raised me.

52 m
Deepest dive
2:04
Longest dive
113
Dives
Sightings
9
Days between first and last sighting
84
Deepest dive on record
52 m · this residency

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
May 1, 202698 m7.4°C52 m
May 2, 202636 m7.2°C27 m
Jun 21, 202628 m15.3°C21 m
Jun 29, 202628 m17.9°C26 m
Jun 29, 202628 m17.9°C25 m
Jul 2, 202628 m19.5°C25 m
Jul 3, 202637 m19.9°C25 m
Jul 19, 202632 m19.3°C29 m
Jul 25, 202677 m18.6°C41 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 1, 2026 — seafloor 98 m (measured), deepest dive 52 m (modelled)May 1May 2, 2026 — seafloor 36 m (measured), deepest dive 27 m (modelled)May 2Jun 21, 2026 — seafloor 28 m (measured), deepest dive 21 m (modelled)Jun 21Jun 29, 2026 — seafloor 28 m (measured), deepest dive 26 m (modelled)Jun 29Jun 29, 2026 — seafloor 28 m (measured), deepest dive 25 m (modelled)Jun 29Jul 2, 2026 — seafloor 28 m (measured), deepest dive 25 m (modelled)Jul 2Jul 3, 2026 — seafloor 37 m (measured), deepest dive 25 m (modelled)Jul 3Jul 19, 2026 — seafloor 32 m (measured), deepest dive 29 m (modelled)Jul 19Jul 25, 2026 — seafloor 77 m (measured), deepest dive 41 m (modelled)Jul 25

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

Dives

52 m
Deepest dive
2:04
Longest dive
113
Dives
14 m
Avg dive depth
9
Sightings
84
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010052 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (98 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 · May 1, 2026

measured
Seafloor depth
98 m
Sea-surface temperature
7.4°C
Distance from shore
29.0 km

Across the residency · 9 sightings

measured
Seafloor depth
28 m – 98 m
Sea-surface temperature
7.2°C – 19.9°C
Distance from shore
9.0 km – 56.0 km

Sources: GEBCO seafloor grid · NOAA OISST 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.