Christmas Island red crabs grow slowly, reaching about 40mm in carapace width after 4-5 years. They are sexually mature at this age and begin to participate in the breeding migrations.

• 圣诞岛红蟹生长缓慢，4-5年以后壳长才达到40毫米。在这个时候它们性征发育成熟并开始参与繁殖大迁徙。