The grounds · 180 ft · banks, ledges and wrecks

Spiny Dogfish

Squalus acanthias. Prime water reaches Penobscot Bay in New England right now (59°F at the surface). Fish it 49–208 ft down — that is where 53–43°F water sits off Penobscot Bay.

Spiny Dogfish identification illustration
LaneThe grounds · 30 fa (180 ft)
Depth it holds49–656 ft
Prime water43–59°F (workable 43–68°F)
Holds in the column49–656 ft down below the surface, over 49–656 ft of water
Judged onsurface temperature (NASA MUR satellite)
Structurenone

The water column off Penobscot Bay

0 ft105 ft210 ft157 ft of workable water49–207 ft · 53–43°F

The strip is the water itself, coloured by temperature from the surface down to the 210 ft surveyed bottom at that spot — one band per RTOFS model level. The outlined stretch is where Spiny Dogfish's temperature band (43–68°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.

How it's fished

Impossible to avoid once they move in — move off the pack or switch to a bait they cannot swallow.

Region by region — right now

RegionSeasonPrime waterTempFish it atMonths
New England in season reaches Penobscot Bay 59°F 49–208 ft
J
F
M
A
M
J
J
Mid-Atlantic off-season — — —
J
F
M
A
M
J
J
"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 30-fathom lane whose surface temperature sits inside this species' band. It is water, not a sighting report.
Charted grounds on the 30-fathom lane
Wilmington Canyon