Named after Guan Yu (
关公), the red-faced Chinese general, because the carapace resembles an angry warrior's face. Carl Sagan famously discussed this crab in Cosmos as an example of artificial selection: Japanese fishermen returned face-patterned crabs to the sea out of respect for the drowned Heike warriors of the 1185 Battle of Dan-no-ura, so those crabs reproduced more.
