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Species: Ogilbia nigromarginata, Black-edged brotula

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D, A & C - black margins
pectoral long

Ogilbia nigromarginata Moller, Schwarzhans & Nielsen, 2005

Black-edged brotula

Body elongate but deep & strongly compressed; head relatively long (23.8-27.6% of SL) and deep (height ~ 18.7% of SL), with a high profile; snout angular;  a sharp spine on opercle that has 1 tip; eye relatively large (2.1-3.1% of SL); top jaw bone expanded vertically at rear; preopercle with 3 pores at lower rear corner, upper part with a pore ; gill rakers 14-17, 2-4 long rakers in angle of arch; origin of dorsal fin at level of middle of pectoral fins; pelvic fins inserted below rear part of head; dorsal rays 67-75; anal rays 50-57; origin of anal fin under dorsal rays 20-25; pectoral rays 17-20; pectoral relatively long (usually > 14% of SL); tail fin rays 16; lateral line indistinct, continuous, complete; body covered with relatively large overlapping scales, about 110 in midlateral series; patch of cheek scales with 8 (6-8) vertical rows of scales; belly with scales; penis curved, with abrupt tapering to thin point; 2 pairs of large pseudoclaspers associated with penis, outer pair broad, expanded at tip, inner pair large, with 2 branches, front one bending forwards, rear one bending backwards .

Preserved fish pale brown, paler below; edges of dorsal, anal and tail fins black.

Size: reaches 8.6 cm.

Inhabits shallow reefs.

Depth: 0-33 m.

Known only from the Gulf of California.

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  • Marine Only
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Reef only
  • Reef (rock/coral/oyster)
  • Rocks
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
  • No Data
  • Bony fishes
Egg Type
  • No data
  • No pelagic phase
  • Live birth
  • No pelagic larva
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • Continent
  • TEP endemic
  • Continental TEP endemic
  • Continent only
  • Cortez province endemic
  • All species
  • Resident
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 8.6
Depth Range Min
  • 0
Depth Range Max
  • 33