|
Name: |
Gemfish (Rexea solandri) |
Family: |
Gempylidae (Snake mackerels) |
Order: |
Perciformes (perch-likes) |
Class: |
Actinopterygii (ray-finned fishes) |
Alternative Name: |
Silver gemfish |
Max size: |
110 cm SL (male/unsexed; Ref. 6181); max. published weight: 16.0 kg (Ref. 28838); max. reported age: 16 years |
Environment: |
Bathydemersal; oceanodromous (Ref. 51243); marine ; depth range 100 - 700 m |
Climate: |
Deep-water; 23°S - 47°S |
Importance: |
Fisheries: commercial |
Resilience: |
Low, minimum population doubling time 4.5 - 14 years (K=0.15-0.21; tm=3-6; tmax=16; Fec=500,000) |
Distribution: |
Southwest Pacific: off southern, southwestern and southeastern Australia, Tasmania and New Zealand. Occurrence records from Madagascar and Japan need to be verified. |
Diagnosis: |
Dorsal spines (total): 18-19; Dorsal soft rays (total): 16-19; Anal spines: 2; Anal soft rays: 13-16; Vertebrae: 36. Body entirely scaled at over 25 cm SL. Lateral line branching below the 5th to the 6th spine of the first dorsal fin. The upper branch reaches beyond the origin of the second dorsal fin, usually ending between the 8th to the 12th soft ray. The lower branch runs mid laterally, undulating above the anal-fin base. Body is bluish above, silvery below, a black blotch distally on two anterior membranes of the first dorsal fin, the rest of the fin is grayish. |