Uca tetragonon
Physical Features：
The shield of the Uca tetragonon is dark blue, covered with black mesh patterns or irregular light spots; the major chelipeds are yellow-orange, with brown spots on the upper part of the palm, and the immovable finger near the palm is red, with red or yellow-orange walking legs.
Living Habits：
This crab inhabits mudflats between coral reefs or rocky reefs, and also appears in mudflats where oyster shells and soil are mixed. In Dapeng Bay, it mainly inhabits mudflats containing gravel piles and oyster shells, with only a small population. The swing method is semi-extended style.