Pseudorasbora pugnax Kawase & Hosoya 2015

Pseudorasbora pugnax can be diagnosed from other Japanese congeners by having a faint dark stripe on the flank which disappears in females and poorly-developed nuptial tubercles in adult males. It differs from P. parva in having longer head (27.5-31.9 % SL vs. 23.5-27.3), lateral line incomplete (vs. complete), infraorbital, supraorbital and supratemporal canals of the cephalic lateralis system incomplete (vs. complete). It can be further distinguished from P. pumila in having 33-34 vertebrae (vs. 34-35), infraorbital canal of cephalic lateralis system developed (vs. undeveloped) with a rostral branch present (vs. absent), nasal canal present (vs. absent) and mandibular canal complete (vs. incomplete) (Ref. 103407).Description: 3 simple and 7 branched rays on dorsal fin; 3 simple and 6 branched rays on anal fin; 1 simple and 12-14 branched rays on pectoral fin; 2 simple and 7 branched rays on pelvic fin; 0-6 pored lateral-line scales followed by 27-33 unpored scales (Ref. 103407).

Dorsal soft rays (total): 10; Analsoft rays: 9; Vertebrae: 33 - 34

Occurs in irrigation canals and ponds (Ref. 103407).

Occurs in deep irrigation canals and ponds (1-2 m depth) with emergent plant growth. Spawns from late March to early July and preferentially lays eggs under stones (< 200 cm3 volume) in shallow water (< 40 cm depth) (Ref. 103407).

Pseudorasbora pugnax is a species of cyprinid fish endemic to Honshu, Japan.