1. Appearance and living environment: The corpse turtle is a mollusk, belonging to Gastropoda, mainly living in fresh water environment, with a conical shape and a hard shell to protect the body, usually grayish brown or black. The corpse turtle has a flexible body, a pair of tentacles and eyes, feeds on algae and organic waste, and often looks for food in the bottom of the water or mud. The freshwater mussel is a crustacean, belonging to Decapoda, which mainly lives in the ocean or fresh water. Its shape is flat, and it has a hard shell to protect its body, usually transparent or light yellow. The body of Biwa shrimp is obviously segmented, with a pair of long tentacles and compound eyes. It feeds on plankton and benthos and often swims in the water or feeds on the bottom.

2. Biological classification: The corpse turtle does not exist in reality, and it is a fictional creature in Tomb Raider Notes. And the clam shrimp is a real animal in reality.