Shorefishes of the Eastern Pacific online information system

Español  Contact

Species: Myxodagnus opercularis, Dart stargazer, Gill's sand-stargazer

All Families:   All Genera:   All Species:

head conical; snout < / = eye
dark bar under eye
back: 14-18 dark saddles
flank: 3 stripes
lip flaps: ~7.5 top; 14 bottom
D IX; A 36; pectoral 14
LL continuous, 50

Myxodagnus opercularis Gill, 1861

Dart stargazer, Gill's sand-stargazer

Body long and slender, tapering to tail; head a pointed cone;  snout shorter than or equal to eye diameter; lower jaw strongly projecting; eyes not on stalks; top and bottom lips with skin flaps, 7.5 (4-10) top flaps, 14 (10-18) bottom flaps; tubular nostrils; operculum with 6 (4-8) skin flaps;  dorsal fin continuous, origin well behind nape over of just behind anal fin origin, IX (VII-XI), 29 (27-31); anal II, 36 (33-38); pectoral 13-15 (14); lateral line continuous, bends down under dorsal spines III-V; scales smooth, head and belly scaleless; lateral line scales 50 (47-52).

Preserved fish: markings variable, often indistinct; head blotched, a dark bar under eye,  an indistinct dark bar between eyes, small spot behind front nostril; lower jaw plain or blotched; nape with a large central blotch and a pair of small side blotches before that; body generally light tan; usually with 14-18 thin dark saddles across top of back; side with 3 indistinct brownish stripes, top one under dorsal fin base, central one along lateral line (ending in a dark spot on tail fin base), bottom one above anal fin base (the last two may be absent); fins pale, except tail has faint brown streaks.

Size: 8.8 cm.

Habitat: coastal sandy areas.

Depth: 0.2-18m. usually less than 3m.

Northern Baja through the western and central eastern Gulf of California; the Revillagigedos.

High Resolution Map Download

Species Data Create Report Export as Word File Export as Excel File
  • Marine Only
  • Marine
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
  • Sand & gravel
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic worms
  • Mobile benthic gastropods/bivalves
  • Bony fishes
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • Brooded
  • No data
  • Pelagic larva
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • Continent
  • All species
  • Continent + Island (s)
  • TEP endemic
  • Island (s)
  • Resident
Climate Zone
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 8.8
Depth Range Min
  • 0
Depth Range Max
  • 18