Another name for the longtail butterfly ray is variegated butterfly ray. The longtail butterfly ray attains a maximum width of . The California butterfly ray ("Gymnura marmorata") is a species of ray in the family Gymnuridae. The zonetail butterfly ray ("Gymnura zonura") is a species of fish in the family Gymnuridae. The Japanese butterfly ray ("Gymnura japonica") is a species of ray in the family Gymnuridae.