Sicyopterus calliochromus Keith, Allen & Lord 2012

A Sicyopterus with only 2 lateral clefts on upper crenulated lip and a second dorsal fin with 1 spine and 10 segmented rays. A distinctive gold colour on entire body, both in males and females, with two ventral black bands from pectoral base to upper hypural, a black mask on the front of the head below the eyes and a black spot on the ventral part of the head. Females with bulbous urogenital papilla with fim briate projections around a tubular ovipositor, which seems to be unique in Sicyopterus species. Fins particularly long both in males and females. (Ref. 90225).

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).

Sicyopterus calliochromus is a species of goby that is only known from the waters of the Tirawiwa River, which is a major tributary of the Wapoga River, which in turn flows into the eastern edge of Cenderawasih Bay, in the Papua Province in Indonesia. This species can reach a length of 5.8 centimetres (2.3 in) SL.