Scientific Name
Assessor randalli  
Assessor randalli蘭氏燕尾七夕魚
by: Lab of Fish Ecol. and Evo., BRCAS
Author Allen & Kuiter, 1976 Depth - M
Chinese 蘭氏燕尾七夕魚 Poisonous Fish No 
Family_Chinese 七夕魚科 Economic Fish No 
Family F344 Plesiopidae Edible Fish No  Chinese In Mainland China 藍氏燕尾鮗 
Max Length 4 cm  Aquarium Fish No  Common Name 七夕魚 
Distribution in World Australia   Distribution in Taiwan East、South、ShaoLiuChew、LanI Is.、Greeb IS. 
Habitats Coral、Coastal  Holotype Locality Ryukyu Is. 
Reference 臺灣魚類誌(沈等, 1993);Fish of Japan(Nakabo, 2002)  Allen, G. R. etc. 1976 沈世傑 編 Shih-Chieh Shen ed. 1993 Nakabo T. 2002 Nakabo T. 2002 
Specimen List ASIZP0056841. ASIZP0056842. ASIZP0069891. ASIZP0073527. ASIZP0803380. ASIZP0806076. ASIZP0913380. ASIZP0916076. BPBMI23350. NMMBP02495. NMMSTP00170. NTOUP201006-348. NTOUP201006-354. NTUM06171. NTUM06442. USNM00295662.  
Common Name Randall's spiny basslet 
Redlist Status NL Not in IUCN Redlist     
Characteristic Body elongate, slightly compressed. Snout short. A single dorsal fin with XI spines and 10 segmented rays, with barely incised fin membranes between the spines; anal fin with III spines and 10 segmented rays; pectoral fins with 15 rays; pelvic fins with I spine and 4 segmented rays; caudal fin deeply forked. Lateral line disjunct and in 2 parts, with a more anterior dorsal lateral line running near dorsal-fin base, a posterior lateral line running midlaterally onto caudal peduncle. Body uniformly dark blue to dark brown.
habitats Found in coral reef gullies. Usually hovering at hole entrances. Strikingly nervous.  
Distribution Distributed in the western Pacific including southern Japan, Taiwan and eastern Australia. It is found in southern Taiwanese waters; Siao Liouciou, southwestern Taiwan and Lanyu, southeastern Taiwan.  
Utility No commercial value.