Blue flounder (Crossorhombus azureus) fish species and information / pictures of Blue flounder - Crossorhombus azureus

Blue flounder (Crossorhombus azureus) fish species information

Scientific Name
Crossorhombus azureus

Common Name
Blue flounder

Biology
Dorsal soft rays (total): 84-92; Anal soft rays: 63 - 74. Ground colour on eyed side brownish grey, with darker spots and blotches. Fins paler than body, dorsal and anal fins with small dark spots, caudal fin with 2 distinct dark bands. Males with small dark spots in anterior part of interorbital region. Blind side whitish in females. Males with distinct bluish black pyriform colour pattern on blind side. Body ovoid, its depth 1.7 to 2 times in SL. Head small, snout shorter than eye, profile steep anterior to interorbital area. Head length 3.3 to 4.5 times in SL. Interorbital region broad and concave, wider in males than females in specimens greater than about 6 cm SL. Males with a rostral spine and 1 to 3 low bony bumps around orbits. Both eyes on left side of head, front margin of upper eye slightly behind front margin of lower eye. Both eyes in males larger than about 6 cm SL with a flap on posterior area. Mouth small, reaching to or slightly beyond anterio

Classification

Classified By
Alcock, 1889
Class
Ray-finned fishes (Actinopterygii)
Order
Flatfishes (Pleuronectiformes)
Family
Lefteye flounders (Bothidae)

Distribution

Region
Indo-West Pacific
Distribution
Indo-West Pacific: Bay of Bengal, northwestern Australia, South China Sea, China, Taiwan, Japan, Viet Nam, and Aru Islands, Indonesia.
Range
Unknown

Environment

Climate
Tropical
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
13 m
Depth To - meters
60 m
Zone
demersal
Environment
Marine; demersal; depth range 13 - 60 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
18.0 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 to moderate vulnerability (29 of 100)
Resilience
Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)
Threat To Humans
  Harmless
IUCN Red List Status
  Not Evaluated