The edge · 600 ft · shelf break and canyons

Porbeagle Shark

Lamna nasus. Prime water reaches Penobscot Bay in New England right now (60°F at the surface). Fish it 66–492 ft down — that is where 59–44°F water sits off Penobscot Bay.

Porbeagle Shark identification illustration
LaneThe edge · 100 fa (600 ft)
Depth it holds164–1312 ft
Prime water41–55°F (workable 41–63°F)
Holds in the column66–656 ft down below the surface, over 164–1312 ft of water
Judged onsurface temperature (NASA MUR satellite)
Structurenone

The water column off Penobscot Bay

0 ft297 ft594 ft529 ft of workable water66–594 ft · 59–44°F

The strip is the water itself, coloured by temperature from the surface down to the 594 ft surveyed bottom at that spot — one band per RTOFS model level. The outlined stretch is where Porbeagle Shark's temperature band (41–63°F) and the depth it holds actually overlap. That thickness is the number that matters: it is how much water you can work, not just whether the spot is warm enough somewhere. One model cycle, not a weekly archive — this holds still while the surface map scrubs.

In 3D

Drag to rotate, pinch or scroll to zoom. 3D model traced from a NOAA/NMFS; placard image credits: J. Castro, W. B. Driggers III, E. R. Hoffmayer and S. Iglésias, NOAA public outreach image; public domain reference — source.

How it's fished

A cold-water shark — the one still in the slick in November when the makos have gone.

Region by region — right now

RegionSeasonPrime waterTempFish it atMonths
New England in season reaches Penobscot Bay 60°F 66–492 ft
J
F
M
A
M
J
Mid-Atlantic off-season — — —
J
F
M
A
M
"Fish it at" is where this species' temperature band and its holding depth overlap in the water column, from the RTOFS profile (13 levels, 0–300 m) — the depth to actually put a bait, not just the place. "Prime water" is the furthest sampled station on the 100-fathom lane whose surface temperature sits inside this species' band. It is water, not a sighting report.
Charted grounds on the 100-fathom lane
Jeffreys Ledge