A ghost crab isn't a single type of crab, but is a group or related crabs of the species Ocypode. They have a bit of range in their sizes, as you might guess, but the largest ones run just a few ounces, tops. A link is provided below.
i have no idea, but i hear that the ghost crab can camouflage!
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ghost crab
Ghost crabs typically weigh between 1 to 2.5 ounces (30 to 70 grams), depending on the species and individual size. They have a compact body structure that allows them to burrow and move quickly on sandy beaches. The largest species, like the Atlantic ghost crab, can reach weights closer to the upper end of this range.
Ocypode quadrate
The ghost crab lives down the Atlantic coasts of the United States, starting around Rhode Island, and on down to the coasts of Brazil.
it depends on the size of the crab
The scientific name for the ghost crab is "Ocypode ceratophthalmus," belonging to the genus Ocypode within the family Ocypodidae.
No, they will not. The dragon-fish can eat the ghost shrimp and the snail, and the crab will try to eat anything he can catch.
Alligators eat anything they can catch. A ghost crab would not be much of a snack, though, and they are very quick so most alligators don't bother chasing them.
In an average medium size crab, there is about ½ cup of meat. There usually isn't a lot of meat in crabs.