Paraliparis Nigellus (Paraliparis nigellus) is a ray-finned fish of the family Liparidae. It inhabits marine (saltwater) waters in deep-water environments. This species can reach a maximum total length of 13.6 cm. It occurs at depths between 1950 and 2107 metres. With a trophic level of 3.4, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Data Deficient on the IUCN Red List.
Dorsal soft rays (total): 64; Anal soft rays: 59; Vertebrae: 73. This species is distinguished by the following characters: D 64, A 59, P 23-25, C 8; vertebrae 73 (12-61); pectoral radials 4 (3+1); simple and uniserial teeth except near jaw symphysis; gill opening shorter than pupil diameter; undeveloped opercular flap; head 16% SL; eye 28% of head length (HL); one symphyseal mandibular pore; pectoral fin with notch rays not rudimentary; interneural of the first dorsal-fin ray between neural spine 6 and 7; anus behind vertical through gill opening; mandible to anus distance almost equal to the length of anus to anal-fin origin; body color dark black-brown, with bluish tint, peritoneum black .: elongated; Cross section: compressed.
Behavioural data for Paraliparis Nigellus is currently being reviewed.
Marine; bathydemersal; depth range 1950 - 2107 m . Deep-water Northeast Atlantic: northern Mid-Atlantic Ridge and Azores.
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