Takehima Aquarium Limited Acrylic Keyholder. Brand new, unused. Opened for photography. Fish name: Mandarinfish Size: Approximately 6cm x 3.5cm The Mandarinfish (Synchiropus splendidus) is a species of saltwater fish in the family Callionymidae. Due to its vivid coloration, it is popular in aquariums as a tropical fish. Please understand that this item is stored at home and has been inspected by an amateur. Thank you for looking.