Shorefishes of the Eastern Pacific online information system

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Species: Gillellus semicinctus, Halfbanded stargazer, Smooth-tip sand-stargazer

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body: ~ 7 dark saddles
D finlet III
A 33
belly scaleless
lip flaps: lower only
pectoral 12
C + branched rays
rear LL 20

Gillellus semicinctus Gilbert, 1890

Halfbanded stargazer, Smooth-tip sand-stargazer

Body compressed, tapering to tail; head moderate size; eyes not on stalks, usually with minute papila; lower lips with 4 skin flaps, none on top lips; lower jaw slightly protruding; tubular nostrils; dorsal fin origin on nape, before level of upper corner of operculum, an isolated finlet of III spines at front, then main fin, III + VIII-XI (total XI-XIV), 28 (25-30); segmented anal rays 33 (30-35); pectoral rays 12 (11-14); tail fin with some  branched rays; lateral line continuous, bends down between dorsal elements 20-23 (17-24); scales smooth; head, pectoral base and belly scaleless; total lateral-line scales 48 (44-53); scales in straight (posterior) part of lateral line 20 (18-23).

Head usualy with indistinct bar crossing through eyes; body whitish with  7 (6-8) dark greyish saddles(equal to or slightly narrower than pale interspaces) on upper half of side, also shorter dark saddles on back between each major saddle.

Maximum length to 5.2 cm.

Habitat: sandy bottoms.

Depth: 5-137 m.

Central Baja to the western Gulf of California, central Mexico to Colombia, also the Galapagos, Revillagigedos and Malpelo.

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  • Marine Only
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Soft bottom only
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • No Data
  • Data
  • Mobile benthic gastropods/bivalves
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
  • Bony fishes
Egg Type
  • No data
  • Benthic
  • Pelagic larva
Global Endemism
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
  • All species
Regional Endemism
  • Continent
  • Island (s)
  • TEP endemic
  • All species
  • Continent + Island (s)
  • Resident
Climate Zone
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 5.2
Depth Range Min
  • 5
Depth Range Max
  • 137