Transparent gradient shell crab

Quick answer：

The 'transparent gradient shell crab' refers to a type of crab with a shell that has a gradient of colors, giving it a unique appearance. Crabs are marine crustaceans with a hard exoskeleton and are known for their diverse colors and patterns. The gradient shell is a result of pigmentation in the crab's shell, which can vary depending on the species. These crabs are often found in shallow waters and are popular in the aquarium trade.