🦞 American lobster vs Blue crab 🦀
The American lobster is about 4 times as long as the blue crab. The American lobster weighs about 150 times as much as the blue crab.
| Row | 🦞 American lobster | 🦀 Blue crab |
|---|---|---|
| Top speed Neither has a checked number yet. | no checked number yet | no checked number yet |
| Weight The American lobster weighs about 150 times as much as the blue crab. | 44 lb20 kg1 | 5.3 oz150 g2 |
| Lives The American lobster usually lives about 30 times as long as the blue crab. | 100 years100 years1 | 3 to 4 years3 to 4 years2 |
| Eats The American lobster eats meat; the blue crab eats plants and animals. | crabs, clams, mussels, sea urchins and small fish | clams, snails, small fish and plants |
| Lives in They can live in the same kind of place. | the cold, rocky seafloor off the Atlantic coast of North America, from Canada to North Carolina | bays, river mouths and shallow coasts along the Atlantic coast of North America, including Chesapeake Bay, and the Gulf of Mexico |
Which one? American lobster or blue crab
🏁 Who would win the race?
We don't have a checked top speed for the American lobster or the blue crab yet, so there is no race.
We only race. Real animals mostly avoid each other. A race is the only fair contest: who reaches the tree first, by top speed.
Compare two more
Getting the animals ready…
📤 Share this pair
The link carries only the two animals’ names: peabody.kids/animals/compare/american-lobster-vs-blue-crab
Where these numbers come from
- NOAA Fisheries, checked 30 October 2026.
- NOAA Fisheries, checked 30 October 2026.
- US Geological Survey, Nonindigenous Aquatic Species fact sheet, American lobster, checked 30 October 2026.