Lord Howe Island flounder (Crossorhombus howensis) fish species and information / pictures of Lord Howe Island flounder - Crossorhombus howensis

Lord Howe Island flounder (Crossorhombus howensis) fish species information

Scientific Name
Crossorhombus howensis

Common Name
Lord Howe Island flounder

Biology
Dorsal soft rays (total): 85-88; Anal soft rays: 64 - 69. Head and body on eyed side tan to grey with many small dark specks and spots. A series of dark spots very close to dorsal and ventral edges of body. About 4 or 5 spots along straight section of lateral line. Dorsal, anal, and caudal fin light coloured with small dark specks. Flaps on eyes of males with dark spots. Blind side of females tan to whitish. Males with distinct bluish black V-shaped mark on blind side. Ventral arm of "V" wider than dorsal arm. Body ovoid, its depth about 1.7 times SL. Head small, snout shorter than eye, profile steep anterior to interorbital area. Head length 3.9 to 4.2 times SL. Interorbital region broad and concave, probably wider in males than females. Males with a rostral spine and several small orbital spines. Both eyes on left side of head, front margin of upper eye over middle of lower eye. Flaps on posterior areas of eyes in males. Mouth small, reaching to below ant

Classification

Classified By
Hensley & Randall, 1993
Class
Ray-finned fishes (Actinopterygii)
Order
Flatfishes (Pleuronectiformes)
Family
Lefteye flounders (Bothidae)

Distribution

Region
Northwest Pacific
Distribution
Northwest Pacific: Taiwan. Southwest Pacific: Lord Howe Island. Possibly occurring in the Western Central Pacific.
Range
Unknown

Environment

Climate
Temperate
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
Unknown m
Depth To - meters
8 m
Zone
demersal
Environment
Marine; demersal; depth range ? - 8 m (Ref. 9824)
Trophic Level
3.5 s.e. 0.37 Based on food items.
Occurs in Marine / Salt water
True
Occurs in Brackish water
False
Occurs in Fresh Water
False
Occurs on Reefs
False
Is kept in Aquariums
False

Physical Size and Genetics

Maximum Length
13.0 cm
Common Length
Unknown cm
Phylogenetic Diversity Index
PD50 = 0.5312 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Fisheries: of no interest
Vulnerability
Low vulnerability (25 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