1, Australia's red crab can not be eaten, because its body contains a special toxic anthranilic acid, consumption will be harmful to human health. Australian red crab is also called Christmas Island red crab, its body is divided into cephalothorax and abdomen. The back of the cephalothorax is covered with cephalothorax armor, and the width of the shell is about 11.5 cm. The frontal region is centrally equipped with the 1st and 2nd pairs of antennae, and the outer part is equipped with stalked compound eyes. The mouthparts consist of 1 pair of large jaws, 2 pairs of small jaws and 3 pairs of jaw feet. The cephalothoracic armor is flanked by 5 pairs of thoracic feet.

2. Morphological Characteristics: The carapace of the Christmas Island red crab can be up to 116 millimeters long, weighs 415-480 grams, and is round with closed gills. The chelicerae are usually the same size unless one of them is injured or dislodged; in this case, the injured limb regenerates and appears smaller during regeneration. Male crabs are generally larger than females, but females have a much wider umbilicus (abdomen) and usually have smaller chelae. The broad umbilicus of female crabs does not become more pronounced until the third year of growth. The dorsal shell is black, and the abdomen and limbs are reddish, like a roasted lobster; the limbs are short, thick, and meaty.