A kind of lobster · also called Lobster

About
Lobster meat is a firm seafood that weighs about 8.75 ounces (248 grams) per standard cup.
Lobster meat has a bulk density of about 0.61 ounces per cubic inch (1.05 grams per milliliter). Cooked claw and tail meat settles closely together, leaving very little empty space when placed in a container. It has a similar heft to other firm shellfish, such as shrimp and lump crab meat. A one-pound (454-gram) portion takes up just under two standard measuring cups.
From Wikipedia
Lobsters are malacostracan decapod crustaceans of the family Nephropidae or its synonym Homaridae. They have long bodies with muscular tails and live in crevices or burrows on the sea floor.
Read more on Wikipedia →Text from Wikipedia’s “Lobster” article, CC BY-SA 4.0.
One cup weighs
8.76 oz (248 g)
Quick answer
One US cup of lobster meat weighs about 8.75 ounces (248 grams). That makes it slightly heavier than an equal volume of liquid water.
Typical figures, the same ones every comparison on the site uses; real ones vary.
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Next to anything: a person, a car, another lobster.