Arius acutirostris Day 1877

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).

Found in lower reaches and estuaries (Ref. 94495).

Probably of minor interest to fisheries.

Arius acutirostris is a species of catfish in the family Ariidae. It is a fresh- and brackish-water species that inhabits lower reaches of tidal rivers and estuaries. It is known from the Irrawaddy and Salween River basins in Myanmar and from the Kraburi River estuary in Thailand. It grows to 40 cm (16 in) in length.

A. acutirostris can be locally common and is caught in local fisheries.