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Viviparous halfbeak (Zenarchopterus gilli) fish species and information / pictures of Viviparous halfbeak - Zenarchopterus gilli
Viviparous halfbeak (Zenarchopterus gilli) fish species information
Scientific Name
Zenarchopterus gilli
Common Name
Viviparous halfbeak
Biology
Dorsal spines (total): 0; Anal spines: 0; Vertebrae: 38 - 39. Upper jaw about as long as wide. Top of snout uniform brown. Sixth anal ray of males greatly enlarged and elongated, reaching the tip of the caudal fin in adults. Fourth dorsal ray of adult males elongated, thickened distally, curving back to the base of the caudal fin. Vertebrae 38-39. Dorsal rays 10 in females and 11 or 12 in males. Anal rays 10-12 in females and 13 in males.
Classification
Classified By
Smith, 1945
Class
Ray-finned fishes (Actinopterygii)
Order
Needle fishes (Beloniformes)
Family
Halfbeaks (Hemiramphidae)
Distribution
Region
Indo-Pacific
Distribution
Indo-Pacific: Madagascar, Mozambique, Seychelles Island, Andaman Islands, East Indies, Caroline Islands, Fiji, Guam and northern Australia. Also India (Ref. 43081)
Range
Unknown
Environment
Climate
Tropical
Water Temperature From
Unknown
°C
Water Temperature To
Unknown
°C
Depth From - meters
Unknown
m
Depth To - meters
Unknown
m
Zone
reef-associated
Environment
Marine; freshwater; brackish; reef-associated; amphidromous (Ref. 59012)
Trophic Level
2.86 s.e. 0.46 Based on size and trophs of closest relatives
Occurs in Marine / Salt water
True
Occurs in Brackish water
True
Occurs in Fresh Water
True
Occurs on Reefs
True
Is kept in Aquariums
False
Physical Size and Genetics
Maximum Length
20.0
cm
Common Length
Unknown
cm
Phylogenetic Diversity Index
PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)
Human Uses and Population
Human Uses
Unknown
Vulnerability
Low vulnerability (12 of 100)
Resilience
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)
Threat To Humans
Harmless
IUCN Red List Status
Not Evaluated