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Overview

Comprehensive Description

Biology

Travels 300 km up the Mekong River, above Phnom Penh but believed to reproduce only in marine waters. Feeds on fishes and swims well upstream river because of easy food availability (Ref. 12693). No information on biology available (Ref. 9684). It is a prized food fish in Japan and probably in China as well. Utilized fresh, dried or salted and smoked; consumed pan-fried, broiled and baked (Ref. 9987).
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Distribution

Western Pacific: Akita, Honshu, Sea of Japan, Yellow Sea and China south to Vietnam and Cambodia where it enters the Mekong River.
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Western Pacific from Japan and China south to Vietnam and Cambodia where it enters the Mekong River.
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Physical Description

Morphology

Dorsal spines (total): 15 - 17; Dorsal soft rays (total): 15 - 17; Analspines: 0; Analsoft rays: 16 - 19; Vertebrae: 41 - 42
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Size

Maximum size: 2000 mm FL
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Max. size

247 cm TL (male/unsexed; (Ref. 83530)); max. published weight: 131 g (Ref. 83530)
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Diagnostic Description

Interpelvic process small and bifid. Body covered with small scales. Lateral line abruptly curving down below first dorsal fin. Intestine with 2 folds and 3 limbs. Swim bladder present. Sides silvery with large round, indistinct spots in two poorly defined rows in adults. Juveniles with saddle-like blotches extending down to about middle of body.
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Ecology

Habitat

Environment

pelagic-neritic; amphidromous; freshwater; brackish; marine; depth range 10 - ? m
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Migration

Amphidromous. Refers to fishes that regularly migrate between freshwater and the sea (in both directions), but not for the purpose of breeding, as in anadromous and catadromous species. Sub-division of diadromous. Migrations should be cyclical and predictable and cover more than 100 km.Characteristic elements in amphidromy are: reproduction in fresh water, passage to sea by newly hatched larvae, a period of feeding and growing at sea usually a few months long, return to fresh water of well-grown juveniles, a further period of feeding and growing in fresh water, followed by reproduction there (Ref. 82692).
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Trophic Strategy

Feeds on fishes and swims well upstream river because of easy food availability (Ref. 12693).
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Conservation

Threats

Data deficient (DD)
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: commercial; gamefish: yes
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