Overview

Comprehensive Description

Description

  Common names: flounder (English), lenguado (Espanol)
 
Syacium ovale (Günther, 1864)


Oval flounder



Body height 39-48% of SL; head length 26-30% of SL; snout with slight concavity before top eye; snout length before top eye < 24% of head length; eyes on left side; eyes ~ parallel; width between eyes < 6% of head length; mouth of moderate length, 32-38% of head length, ends under mid-eye; jaws on blind side not arched;  fixed teeth in 2 rows in upper jaw, 1 row lower jaw; 7-9 short, fat, serrated lower gill rakers; dorsal rays 83-91; 64-71 anal rays; pectoral fin 59-71% head length in both sexes; base of eye side pelvic on midline of body; tail base 33-45% of SL); urinary papilla on blind side, immediately behind anus; lateral line not extending onto head, starts at corner of operculum, relatively straight; 52-58 lateral line scales; scales very rough in eye-side, smooth an blind side.

Color variable from more or less uniform brown to brown with numerous dark spots that extend onto median fins.


Size: to about 25 cm.

Inhabits flat sand bottoms between 9 and 40 m.


Depth: 10-60 m.

Southern Baja and the Gulf of California to Peru; the Revillagigedos Islands, rarely in the Galapagos.   
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Biology

Inhabits flat sand bottoms (Ref. 11482). Feeds on small fishes and crustaceans (Ref. 28023). Marketed fresh.
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Distribution

Depth

Depth Range (m): 10 (S) - 60 (S)
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Zoogeography

See Map (including site records) of Distribution in the Tropical Eastern Pacific 
 
Global Endemism: All species, East Pacific endemic, Tropical Eastern Pacific (TEP) endemic

Regional Endemism: All species, TEP endemic, Continent + Island (s), Continent, Island (s)

Residency: Resident

Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California), Northern Subtropical (Cortez Province + Sinaloan Gap), Northern Tropical (Mexican Province to Nicaragua + Revillagigedos), Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo), South Temperate (Peruvian Province )
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Eastern Pacific: Mexico to Peru.
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Eastern central Pacific.
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Physical Description

Morphology

Size

Length max (cm): 25.0 (S)
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Size

Maximum size: 230 mm TL
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Max. size

23.0 cm TL (male/unsexed; (Ref. 9330))
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Ecology

Habitat

Depth range based on 112 specimens in 1 taxon.
Water temperature and chemistry ranges based on 12 samples.

Environmental ranges
  Depth range (m): 1.8 - 289
  Temperature range (°C): 7.362 - 27.859
  Nitrate (umol/L): 0.616 - 34.290
  Salinity (PPS): 34.087 - 35.999
  Oxygen (ml/l): 1.386 - 5.139
  Phosphate (umol/l): 0.071 - 2.642
  Silicate (umol/l): 3.091 - 54.807

Graphical representation

Depth range (m): 1.8 - 289

Temperature range (°C): 7.362 - 27.859

Nitrate (umol/L): 0.616 - 34.290

Salinity (PPS): 34.087 - 35.999

Oxygen (ml/l): 1.386 - 5.139

Phosphate (umol/l): 0.071 - 2.642

Silicate (umol/l): 3.091 - 54.807
 
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Salinity: Marine, Brackish

Inshore/Offshore: Inshore, Inshore Only

Water Column Position: Bottom, Bottom only

Habitat: Soft bottom (mud, sand,gravel, beach, estuary & mangrove), Soft bottom only, Sand & gravel

FishBase Habitat: Demersal
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Environment

demersal; marine; depth range 10 - 60 m (Ref. 91172)
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Depth range based on 112 specimens in 1 taxon.
Water temperature and chemistry ranges based on 12 samples.

Environmental ranges
  Depth range (m): 1.8 - 289
  Temperature range (°C): 7.362 - 27.859
  Nitrate (umol/L): 0.616 - 34.290
  Salinity (PPS): 34.087 - 35.999
  Oxygen (ml/l): 1.386 - 5.139
  Phosphate (umol/l): 0.071 - 2.642
  Silicate (umol/l): 3.091 - 54.807

Graphical representation

Depth range (m): 1.8 - 289

Temperature range (°C): 7.362 - 27.859

Nitrate (umol/L): 0.616 - 34.290

Salinity (PPS): 34.087 - 35.999

Oxygen (ml/l): 1.386 - 5.139

Phosphate (umol/l): 0.071 - 2.642

Silicate (umol/l): 3.091 - 54.807
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Depth: 9 - 40m.
From 9 to 40 meters.

Habitat: demersal.
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Trophic Strategy

Feeding

Feeding Group: Carnivore

Diet: mobile benthic crustacea (shrimps/crabs), bony fishes
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Life History and Behavior

Reproduction

Egg Type: Pelagic, Pelagic larva
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Syacium ovale

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 3
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List: Not evaluated / Listed

CITES: Not listed
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Threats

Least Concern (LC)
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: minor commercial; price category: very high; price reliability: unreliable: based on ex-vessel price for species in this order
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