Parioglossus caeruleolineatus Suzuki, Yonezawa & Sakaue, 2010

Family:  Microdesmidae (Wormfishes), subfamily: Ptereleotrinae
Max. size:  2.71 cm SL (male/unsexed); 2.61 cm SL (female)
Environment:  benthopelagic; marine; depth range 0 - 1 m
Distribution:  Northwest Pacific: Ryukyus, Japan.
Diagnosis:  Dorsal spines (total): 7-7; Dorsal soft rays (total): 15-15; Anal spines: 1-1; Anal soft rays: 15-16; Vertebrae: 26-26. This species differs from its congeners in having a gently oblique mouth at an angle of 51-58° (average 55°) to longitudinal axis of body, and in possessing a bright blue stripe running from nape to dorsum of caudal peduncle in male when fresh or alive (Ref. 84007).
Biology:  This species normally swims in schools during high tide or hides in holes on muddy bottoms mixed with pebbles around the roots of mangroves in river mouths. During low tide, they leave the holes and gather in schools in the mangroves at a depth of about 1 m (Ref. 84007).
IUCN Red List Status: Data deficient (DD); Date assessed: 23 July 2018 Ref. (130435)
Threat to humans:  harmless


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