Shorefishes of the Eastern Pacific online information system

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Species: Bollmannia stigmatura, Tail-spot goby

All Families:   All Genera:   All Species:

D1: no dark spot, spines long
D2: I, 13
C: dark blotch
top lip: no black line
pelvics dark
A - dark + orange base

Bollmannia stigmatura Gilbert, 1892

Tailspot Goby

Head & body compressed; body relatively slender (greatest depth 17.5-24% of SL); head rounded, elongate (26-31% of SL); eye large, 8-11% of SL; mouth large, very oblique; teeth in several rows; dorsal fin VII (moderately long, filamentous, 5th longest, reaching to 6th or 7th dorsal ray) + I, 13; anal I, 13; last rays of dorsal & anal reach base of tail fin; pectoral rays 22-25, reaches origin of anal fin; pelvics fused to form disc, front margin of disc scalloped, nearly reaching anus; tail base slender (least depth 7.3-9.9% of SL); tail fin long (~ 50% of SL), strongly pointed; scales large (27-28 rows along body), rough; 7-8 scales before dorsal fin; 1 large + several small scales on upper opercle, several medium sized on upper preopercle, several small scales on lower preopercle; 6-8 medium sized scales on base of pectoral fin.

Grey-brown; head and body with a few orange spots; a prominent black line on top lip; no spot on first dorsal fin; second dorsal dusky, with 2 rows of orange spots; tail fin with a large dark spot covering its base, upper half with orange spots, an orange stripe on lower half; anal fin blackish, with an inner orange stripe; pelvics blackish.

Size: to 12 cm.

Habitat: muddy bottoms.

Depth: 20-150 m.

The Gulf of California to northern Peru.

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  • Marine
  • Marine Only
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom
  • Bottom only
  • Mud
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Sand & gravel
  • Soft bottom only
FishBase Habitat
  • Demersal
Feeding Group
  • Planktivore
  • No Data
  • Carnivore
  • Mobile benthic crustacea (shrimps/crabs)
  • No Data
  • Mobile benthic worms
Egg Type
  • No data
  • Benthic
  • Pelagic larva
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • All species
  • East Pacific endemic
Regional Endemism
  • 3 provinces (Cortez + Mexican + Panamic) endemic
  • Continent only
  • TEP endemic
  • Continental TEP endemic
  • Continent
  • All species
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • South Temperate (Peruvian Province )
IUCN Red List
  • Data deficient
  • Listed
  • Not listed
Length Max
  • 12
Depth Range Min
  • 20
Depth Range Max
  • 150