Paramoebiasis is strongly suspected to play a prominent role in the rapid die-off of American lobsters in Long Island Sound that occurred in the summer of 1999.
Excretory calcinosis in American lobsters in Long Island Sound was described in 2002.
It is dominated by mollusks (especially mussels), echinoderms and polychaetes, although a wide range of other prey items may be eaten, including other crustaceans, brittle stars and cnidarians.
It only requires a few bacterial cells to cause death of otherwise healthy lobsters.
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Homarus americanus commonly reaches 8–24 inches (200–610 mm) long and weighs 1–9 pounds (0.45–4.08 kg) in weight, but has been known to weigh as much as 44 lb (20 kg), making this the heaviest crustacean in the world. americanus is the European lobster, Homarus gammarus.
The two species are very similar, and can be crossed artificially, although hybrids are unlikely to occur in the wild since their ranges do not overlap.
The developing embryo passes through several molts within the egg, before hatching as a metanauplius larva.
When the eggs hatch, the female releases them by waving her tail in the water, setting batches of larvae free.
These hairs are covered with multiple nerve cells that can detect odors.