Teleostei (teleosts) > 
Gobiiformes (Gobies) > 
Microdesmidae (Wormfishes) > Ptereleotrinae						
							
							Etymology: Parioglossus: Greek, pareia = jaw + Greek, glossa = tongue (Ref. 45335); caeruleolineatus: Name from Latin 'caeruleo' for blue and 'lineatus' for line, referring to the distinct bright blue stripe running from nape to dorsum of caudl peduncle in males when alive or still fresh.
						
					
				
					Environment: milieu / climate zone / depth range / distribution range					
						Ecology					
				
				
				
					Marine;  benthopelagic; depth range 0 - 1 m (Ref. 84007). Subtropical				
				 
			
			
			
				
				
				
					Northwest Pacific:  Ryukyus, Japan.
				
				
			
			
				
					Size / Weight / Age
				
				
				
					Maturity: Lm ?  range ? - ? cm
 Max length : 2.7 cm SL male/unsexed; (Ref. 84007); 2.6 cm SL (female)				
				 
			
			
						
				
					Short description					
					Identification keys | Morphology | Morphometrics					
				
				
				
					Dorsal spines (total): 7; Dorsal soft rays (total): 15; Anal spines: 1; Anal soft rays: 15 - 16; Vertebrae: 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).
Body shape (shape guide): elongated.				
				 
			
			
			
			
			
			
			
				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).			
			 
			
			
			
				
					Life cycle and mating behavior					
					Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae				
				
				
				
								
				
			
			 
				
				
				
					Suzuki, T., T. Yonezawa and J. Sakaue, 2010. Three new secies of the ptereleotrid fish genus Parioglossus (Perciformes: Gobioidei) from Japan, Palau and India. Bull. Natl. Mus. Nat. Sci., Ser. A, (Suppl. 4):31-48. (Ref. 84007)
				
				 
			
			
			
							
					
						IUCN Red List Status   (Ref. 130435: Version 2025-1)
					
					
				 
					
			
			
			
			
			
			
			
				
					Threat to humans  
				
				
				
					  Harmless				
				
			 
			
			
			
			
				
					Human uses  				
				
				
									
				
				
			
			
						
			
			
			
				
Tools
				
			
			
			
				
Special reports
 
				
			
			
			
				
Download XML
				
			
			
			
				
					Internet sources
				
				
			
			
			
				
					Estimates based on models				
				
				
				
				
				
					
					Phylogenetic diversity index  (Ref. 
82804):  PD
50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].					
													Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 
93245).
					
					Trophic level  (Ref. 
69278):  3.1   ±0.4 se; based on size and trophs of closest relatives					
											
				
				
									
					
											
				
									
					Fishing Vulnerability  (Ref. 
59153):  Low vulnerability (10 of 100). 
🛈