Shorefishes of the Eastern Pacific online information system

Español  Contact

Species: Decapterus macrosoma, Shortfin scad

All Families:   All Genera:   All Species:

scales on nape to rear edge of pupil
straight part LL: 14-29 scales + 24-40 scutes
C clear to greyish
top jaw end concave above & at rear, lower corner rounded
mouth membrane grey or transparent
pectoral short

Decapterus macrosoma Bleeker, 1851

Shortfin scad

Elongate, slender, cylindrical; eye covered with adipose eyelid except for central slit; top and rear end of upper jaw concave on top and at end, rounded at the lower corner; front of shoulder that meets gill chamber with 2 moderate sized papillae; gill rakers (including rudiments) 10-13 + 34-38; dorsal rays VIII+I, 33-39 (including detached rear finlet); anal rays II+I, 27-31 (including detached rear finlet); pectoral fin 61-75% of head length; tail base slender; tail strongly forked; lateral line with long, low arch anteriorly, scales on straight part by 14-29, followed by 24-40 scutes; total scales and scutes in lateral line (excluding caudal scales) 110-126; scales on top of head usually extend forward to level of the rear margin of pupil; branches of lateral line extending onto nape only.

Metallic blue on back, silvery below; membrane at front of roof of mouth transparent or grey; a small black blotch on upper margin of gill cover; caudal fin translucent to dusky.

Size: attains 35 cm.

Habitat: pelagic in coastal and oceanic waters.

Depth: 12-170 m.

Widely distributed in the tropical Indo-Pacific from East Africa to the Americas; southern Baja to Chile; the Galapagos.

High Resolution Map Download

Species Data Create Report Export as Word File Export as Excel File
  • Marine Only
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Surface
  • Near Surface
  • Water column only
  • Mid Water
  • Water column
FishBase Habitat
  • Pelagic
Feeding Group
  • Data
  • Planktivore
  • Data
  • Pelagic crustacea
  • Pelagic fish larvae
  • Pelagic fish eggs
  • Zooplankton
Egg Type
  • Pelagic larva
  • No data
  • Pelagic
Global Endemism
  • "Transpacific" (East + Central &/or West Pacific)
  • All Pacific (West + Central + East)
  • TEP non-endemic
  • All species
  • Indo-Pacific only (Indian + Pacific Oceans)
Regional Endemism
  • Eastern Pacific non-endemic
  • Continent only
  • Continent
  • Tropical Eastern Pacific (TEP) non-endemic
  • All species
  • Resident
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • South Temperate (Peruvian Province )
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Antitropical (North and South temperate)
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Length Max
  • 35
Depth Range Min
  • 12
Depth Range Max
  • 170