Mass. State record porbeagle 482-1/2
lbs. Caught by Jamie and Matt Grimes
on Sept. 5, 2009
This record was broken in 2011
by a 495 lb porbeagle.

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Salmon shark, Lamna ditropis
Porbeagle, Lamna nasus

Max. Size: 10 foot fork length, 750 lbs. Water temp 32 -64 degrees
The temperature range of 40-50 degrees ideal for porbeagles.

IGFA record - 507 lbs.......Maine State record - 548 lbs

There are 2 Lamna species . Lamna
, and Lamna ditropis.

In New England, and across the Atlantic
to the British Isles and Europe, and on
into the Mediterranean, we have the
Lamna nasus. In the
southern hemisphere the porbeagle,
Lamna nasus is also found in the
southern areas of South America, Africa
and Australia.

A Canadian longliner Capt. says that
they have actually longlined porbeagles
in 32 deg. water - that is about 4 degs.
above the freezing point of saltwater.
The preferred set for a longliner
targeting porbeagles is 40- 50 deg.

The water in New England is never to
cold for a porbeagle and they are here
year round.

The female porbeagles get larger than
the males. A female can reach 600 lbs,
and a male around 450 lbs.

(Females being larger than the males is
not the case in every shark species.)

Only two sharks in the
world have the short
ridge on the upper part
of the lower tail lobe.
They are the porbeagle,
Lamna nasus and the
salmon shark,

The salmon shark differs from the
porbeagle in some external
characteristics; it lacks the white
area on the back of the dorsal, has
a shorter snout, and the salmon
shark has dark spots all over the
white underside including under the
pectoral fins.
These spots can be lacking in the
smaller salmon shark specimens.
In this photo you can see the
secondary keel on the lower tail
lobe, as indicated by the arrow.
Only the porbeagle and salmon
shark have this characeristic.

Lamna ditropis the salmon shark,
is on the West Coast, Alaska, and
on over to China. We don't have
them here in New England.

It's porbeagle weather
white on back
of dorsal
The water is never to cold for a porbeagle to be
in New England waters.

The white patch, or white back edge of the
dorsal is usually very noticeable.

The tiny second dorsal is directly over, or
slightly toward the tail in relation to the anal fin

Porbeagles and salmon sharks are the only two
shark species with the secondary keel on the

And yes that small porbeagle above was tagged
and released by Mike Delzingo.
Fork Length
10 feet
9.5 feet
9 feet
8.5 feet
8 feet
7.5 feet
7 feet
6.5 feet
6 feet
Fork Length

Mark photo

750 lbs.
645 lbs.
530 lbs.
440 lbs.
370 lbs.
300 lbs.
260 lbs.
210 lbs.
165 lbs.

secondary keel
Porbeagles are in
New England waters
year round.

They tend to swim in
groups, unlike makos.
secondary keel
The range of the Porbeagle, Lamna nasus
Notice the 2nd dorsal
is directly over the anal
My wife giving me a nasty look as she shovels
snow, and I take photos.