Shorefishes of the Eastern Pacific online information system

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Species: Myxodagnus sagitta, Arrow sand-stargazer

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head conical; snout < eye
dark stripes - top back & flank
top lip flaps 9
A 35; pectoral 13
LL: 2 sections, 49

Myxodagnus sagitta Myers & Wade, 1946

Arrow Sand-stargazer

Body long and slender, tapering to tail; head a pointed cone, lower jaw strongly projecting; eyes not on stalks, usually longer than snout; top and bottom lips with skin flaps 9 (4-12) above, 15 (11-20) below; tubular nostrils; dorsal fin continuous, origin well behind nape over anal origin, VII-X (usually IX), 27-31; anal II, 35 (33-37); pectoral 13 (13-14); lateral line bends down under dorsal spines VI-VIII, usually (88% fish) interrupted near rear angle of arch on 1 or both sides; scales smooth, head and belly scaleless; lateral line scales 49 (46-50).

Pale form: light tan, with scattered small patches of dark pigment, irregular lengthwise streaks along nape & along base of dorsal fin, fins clear. Dark form: tan with dark brown markings; top of head blotched & spotted, nape with series of spots & narrow blotches, a broad stripe along upper back, a broad stripe along lateral line, pelvic & anal pale, other fins mottled with brown.

Size: 7 cm.

Habitat: coastal sandy areas.

Depth: 15-45 m.

Galapagos Islands.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
FishBase Habitat
  • Demersal
Feeding Group
  • Data
  • Carnivore
  • Data
  • Mobile benthic gastropods/bivalves
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
Egg Type
  • Brooded
  • Pelagic larva
  • No data
Global Endemism
  • All species
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
Regional Endemism
  • TEP endemic
  • TEP oceanic island (s) endemic
  • Island (s)
  • Island (s) only
  • Galapagos Islands endemic
  • All species
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Vulnerable
  • Listed
  • Not listed
Length Max
  • 7
Depth Range Min
  • 15
Depth Range Max
  • 45