H. Milne-Edwards, 1837
The American lobster, Homarus americ-
anus, is one species of lobster found on the
Atlantic coast of North America. Within
North America, it is also known as the north-
ern lobster, Atlantic lobster or Maine lobster.
It thrives in cold, shallow waters where there
are many rocks and other places to hide from
predators and is both solitary and nocturnal.
feeds on fish, small crustaceans, and
The American lobster is found as far south
as North Carolina, and are famously associ-
ated with the colder waters around the Cana-
dian Maritimes, Newfoundland and Labrador,
Maine, Massachusetts, and New Hamp-
shire,. They commonly range from 20 cm
to 60 cm in length and ½ kg to 4 kg in
weight, but have been known to reach
lengths of well over 1 m and weigh as much
as 20 kg or more, making this the heaviest
marine crustacean in the world. An aver-
age adult is about 230 mm (9 inches) long
and weighs 700 to 900 g (1½ to 2 pounds).
The adult American lobster’s main natural
predator is the codfish, but other enemies in-
clude haddock, flounder, and other lobsters.
Overfishing of cod in the early 20th century
has allowed the lobster population to grow
American lobsters are invertebrates belong-
ing to the Arthropoda phylum along with in-
sects, spiders, and other creatures having an
exoskeleton in place of a backbone. Lobsters,
crabs, shrimps, copepods, and other similar
species are divided into the Crustacea sub-
phylum because of their flexible shells, differ-
entiating them from hard and brittle-shelled
creatures such as oysters, mussels, and
clams. Lobsters are further placed in the or-
der Decapoda because of their ten feet.
American lobsters are located in the in-
fraorder Astacidea which contains onl