Species: Cynoscion nannus, Deepwater weakfish, Dwarf weakfish, Dwarf corvina


rear 3/4 body scales rough
Cynoscion nannus Castro-Aguirre & Arvizu-Martinez, 1976
Dwarf corvina, Dwarf weakfish, Deepwater weakfish
Elongate, fusiform, compressed, oval cross-section; head low, long (33.3-38.5% SL), pointed; eye large (25-33% of head length); mouth a little oblique, reaches to middle of pupil; front of top jaws with 1 pair of large pointed canines; no barbels or pores on chin; 8-10 lower gill rakers; preopercle smooth in adult (with 2 spines in juvenile); dorsal with long base, a small gap separating the two parts, IX-X + I, 18-21; anal II, 8-10, small, length of base ~ snout length; pectoral fins 16-17, relatively long (~25% SL), reaching past pelvic tip; rear margin of tail bluntly angular to rounded; scales rough on rear ¾ body, smooth in front and head, 49-59 pored on lateral line, 5-7 scales between lateral line and dorsal origin, lateral line scales larger than adjacent scales, and with small accessory scales; inner ½ of membranes of soft dorsal and anal fins scaled; lateral line arched at front.
Dark above, silver below; sides with undulating dark lines along scale rows; roof of mouth and gill chamber black, latter visible through side of gill covers; inner base of pectoral black.
Size: 27 cm.
Habitat: offshore, continental shelf, on bottom and midwater.
Depth: 100-815 m.
The SW and SE Gulf of California to Panama.

High Resolution Map Download
- Salinity
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- Marine
- Marine Only
- Inshore/Offshore
-
- Inshore
- Inshore Only
- Water Column Position
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- Bottom
- Near Bottom
- Mid Water
- Bottom + water column
- Habitat
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- Mud
- Water column
- Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
- FishBase Habitat
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- Bentho-Pelagic
- Feeding Group
-
- No Data
- Carnivore
- Diet
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- Bony fishes
- Pelagic crustacea
- No Data
- Octopus/squid/cuttlefish
- Mobile benthic crustacea (shrimps/crabs)
- Egg Type
-
- No data
- Pelagic
- Pelagic larva
- Global Endemism
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- Tropical Eastern Pacific (TEP) endemic
- East Pacific endemic
- All species
- Regional Endemism
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- 3 provinces (Cortez + Mexican + Panamic) endemic
- Continental TEP endemic
- All species
- Continent
- TEP endemic
- Continent only
- Residency
-
- Resident
- Climate Zone
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- Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
- Northern Subtropical (Cortez Province + Sinaloan Gap)
- Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
- IUCN Red List
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- Least concern
- Listed
- CITES
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- Not listed
- Length Max
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- 27
- Depth Range Min
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- 100
- Depth Range Max
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- 815