Florent's Guide To The

Tropical Pacific Reefs

Longnose Filefish
Oxymonacanthus longirostris
Longnose Filefish
Also known as: Harlequin Filefish, Beaked Leatherjacket
Category: Filefishes
Scientific Name: Oxymonacanthus longirostris
Size: 2 to 3.5 in. (5 to 9 cm)  
Depth: 10-120 ft. (3-37 m)
Distribution: Indo-West Pacific, Australia
Chordata (Phylum)
└Vertebrata (Subphylum)
 └Osteichthyes (Parvphylum)
  └Actinopterygii (Gigaclass)
   └Actinopteri (Superclass)
    └Teleostei (Class)
     └Tetraodontiformes (Order)
      └Balistoidei (Suborder)
       └Monacanthidae (Family)
        └Oxymonacanthus (Genus)
         └O. longirostris (Species)

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© 2026 Florent Charpin