Shorefishes of the Eastern Pacific online information system

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Species: Myxodagnus macrognathus, Long-jawed sand-stargazer

All Families:   All Genera:   All Species:

head conical; snout < eye
body: 4 dark stripes
top lip flaps 10
A 37; pectoral 15
LL: continuous or 2 pieces

Myxodagnus macrognathus Hildebrand, 1946

Long-jawed sand-stargazer

Body long and slender, tapering to tail; head a pointed cone, lower jaw strongly projecting; eyes not on stalks, longer than snout; top and bottom lips with skin flaps, 10 (8-13) above, 17 (14-20) below; tubular nostrils; dorsal fin continuous, origin well behind nape over, usually just before anal origin, IX-XI (usually X), 30 (27-31); anal II, 37 (36-39); pectoral 13-16 (usually 15); lateral line continuous or broken, bends down under dorsal spines VI-VIII; scales smooth, head and belly scaleless; lateral line scales 51 (50-53).

Color variable; head blotched or spotted; usually a dark stripe (composed of a spot at the base of each dorsal fin ray) along midback, 2 thin dark stripes along upper side, with lower one ending in a large blotch on the base of the tail fin; a dark line above the anal fin base; tail fin with 1-2 bars.

Size: 9.6 cm.

Habitat: coastal sandy areas.

Depth: 1-20 m.

SE Gulf of California to northern Peru.

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  • Marine
  • Marine Only
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Sand & gravel
  • Soft bottom only
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
  • No Data
  • Bony fishes
  • Mobile benthic gastropods/bivalves
Egg Type
  • Brooded
  • No data
  • Pelagic larva
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • All species
  • East Pacific endemic
Regional Endemism
  • Continental TEP endemic
  • TEP endemic
  • Continent
  • All species
  • Mexican + Panamic provinces endemic
  • Continent only
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 9.6
Depth Range Min
  • 1
Depth Range Max
  • 20