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Species: Elacatinus serranilla, Serranilla Goby

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snout: narrow blue-white bar
side stripe: narrow, silvery-blue, eye to C center, edged with narrow black stripes
D spines & rays long; A rays long
mouth a little under snout
top lip separate from snout

Elacatinus serranilla Randall & Lobel, 2009

Serranilla Goby

Elongate; head compressed; mouth U-shaped, a little under snout; upper lip separated from snout by a groove; tongue straight edged; teeth in upper jaw in 2 rows, those of males with outer row of 2 enlarged fangs near rear; lower jaw with three large fangs, females also with enlarged canines; gill membranes broadly joined to body under throat, with 5 rays; dorsal fin VII, spines relatively long + I, 10, rays relatively long; length of 2nd dorsal base > distance from 2nd dorsal base to tail fin; anal fin I, 10, rays relatively long; pectoral fins 18 (17-18); pelvic fins I, 5, disk complete; tail rounded; no scales; no lateral line.

Upper 2/3 of head and body blackish; snout with a narrow median blue-white bar from top lip to between front of eyes; a narrow (<eye) blue-white stripe runs high along body from top of eye to ~center of tail fin; black stripes above and below blue-white stripe are narrow, top stripe extends to center of tail fin, bottom stripe to about end of fin.

Reaches: 4.0 cm.

Habitat: Sponge dweller in lagoon and barrier habitats.

Depth: 15-24 m.

Known from Serranilla Bank, Jamaica and Hispaniola

Note: A member of the E. xanthiprora species complex.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Reef only
  • Sponges
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • Data
  • Data
  • Mobile benthic worms
Egg Type
  • Benthic
  • Data
  • Pelagic larva
Global Endemism
  • All species
  • Greater Caribbean endemic
  • West Atlantic Endemic
Regional Endemism
  • Caribbean endemic
  • GC endemic
  • Island (s)
  • Island (s) only
  • All species
  • Resident
Climate Zone
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 4
Depth Range Min
  • 15
Depth Range Max
  • 24