Fuku grooming Hoshi (IMAGE) Cell Press Caption This photo shows Fuku (female: 17 years old) grooming Hoshi (female: 32 years old). She needs only 5 to 10 centimeters between her figers to eyes to get pin-focus for grooming. Comared with Ten, her distance between eye to finger is shoter than that of Ten. Credit Heungjin Ryu (CC BY-NC 4.0) Usage Restrictions Credit Required. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.