Shorefishes of the Eastern Pacific online information system

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Species: Azurina hirundo, Swallow damselfish

All Families:   All Genera:   All Species:

dark blue-grey
lower gill rakers 25-27
pectoral 20-21

Azurina hirundo Jordan & McGregor in Jordan & Evermann, 1898

Swallow Damselfish

Body slender (greatest body depth 25-33% of SL), fusiform, compressed; head pointed, upper and lower profiles similar; 1 pair of nostrils; bone under eye hidden by scales; mouth small, protrusible, slightly oblique, opens at front; teeth in 2 rows, outer row conical; lower gill rakers 25-27; a single continuous dorsal fin, XII, 10-12; anal rays II, 12-13; dorsal and anal fins relatively low; pectoral rays 20-21; no projecting short spines at upper and lower base of tail fin; caudal fin strongly forked; scales are moderately large and rough; 27-31 scales on lateral line; body scaled, head scaled except for area in front of eye and around nostril; basal parts of the median fins scaled; lateral line almost complete, runs along top of tail base almost to tail fin.

Steel blue to olive on upper portion and paler below with orange hue on throat.

Size: reaches 17 cm.

Habitat: in open waters around rocky reefs.

Depth: 5-30 m?

Southern California islands, Guadalupe and Cedros Islands, Alijos Rocks, the Revillagigedo Islands.

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  • Marine
  • Marine Only
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Reef only
  • Reef associated (reef + edges-water column & soft bottom)
  • Rocks
  • Reef (rock/coral/oyster)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Data
  • Planktivore
  • Zooplankton
  • Pelagic fish eggs
  • Pelagic fish larvae
  • Data
Egg Type
  • Benthic
  • Pelagic larva
  • No data
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • All species
  • Island (s)
  • TEP oceanic island (s) endemic
  • Revillagigedo Islands endemic
  • Island (s) only
  • TEP endemic
  • Resident
Climate Zone
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
IUCN Red List
  • Near threatened
  • Listed
  • Not listed
Length Max
  • 17
Depth Range Min
  • 5
Depth Range Max
  • 30