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• 
  Species:
  Bunocephalus verrucosus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Auchenipterichthys coracoideus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Centromochlus musaicus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Liosomadoras morrowi
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Tatia jaracatia
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Batasio fasciolatus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hyalobagrus flavus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Brochis (sub-clade 3) ambiacus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Brochis (sub-clade 3) crimmeni
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Brochis (sub-clade 3) seussi
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hoplisoma boesemani
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hoplisoma sipaliwini
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hoplisoma sp. (Cw159)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hoplisoma sp. (Cw159)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hoplisoma tukano
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Osteogaster sp. (Cw009)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Ancistrus aguaboensis
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Ancistrus dolichopterus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Ancistrus sp. `RIO TOCANTINS`
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Ancistrus sp. (L088)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Ancistrus sp. (L107)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Ancistrus sp. (L513)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Ancistrus sp. (L519)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Aphanotorulus ammophilus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Aphanotorulus emarginatus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Chaetostoma dupouii
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Chaetostoma sp. (L402)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hemiancistrus sp. (L128)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hypancistrus contradens
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hypancistrus debilittera
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hypancistrus sp. (L136)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hypancistrus sp. (L333)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hypancistrus sp. (L527)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hypostomus basilisko
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hypostomus roseopunctatus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Hypostomus sp. (L245)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Lamontichthys llanero
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Loricaria nimairaco
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Oxyropsis wrightiana
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Panaqolus albivermis
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Parancistrus sp. (LDA046)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Parotocinclus haroldoi
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Peckoltia braueri
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Peckoltia compta
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Peckoltia compta
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Peckoltia sabaji
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Pseudacanthicus sp. (L273)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Pseudacanthicus spinosus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Pseudohemiodon platycephalus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Pseudohemiodon unillano
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Pterygoplichthys scrophus
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Rineloricaria aurata
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Rineloricaria sp. (5)
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Sturisomatichthys reinae
  
  Caption: Close-up of dorsal fin
• 
  Species:
  Auchenoglanis senegali
  
  Caption: Close-up of dorsal fin-110 mm SL
• 
  Species:
  Hypancistrus sp. (L174)
  
  Caption: Close-up of dorsal fin.
• 
  Species:
  Acanthicus hystrix
  
  Caption: Close-up of dorsal fin. Rio Tocantins, near town of Estreito, Maranhão state, Brazil
• 
  Species:
  Leiarius pictus
  
  Caption: Close-up of head and dorsal fin
• 
  Species:
  Hemibagrus velox
  
  Caption: Dorsal fin
• 
  Species:
  Mystus carcio
  
  Caption: Dorsal fin
• 
  Species:
  Hoplisoma atropersonatum
  
  Caption: Dorsal fin
• 
  Species:
  Pterodoras granulosus
  
  Caption: Dorsal fin
• 
  Species:
  Gladioglanis anacanthus
  
  Caption: Dorsal fin
• 
  Species:
  Gladioglanis machadoi
  
  Caption: Dorsal fin
• 
  Species:
  Pimelodella sp. `COLOMBIA`
  
  Caption: Dorsal fin
• 
  Species:
  Ancistrus dolichopterus
  
  Caption: Dorsal fin
• 
  Species:
  Ancistrus sp. `RIO PARAGUAY`
  
  Caption: Dorsal fin
• 
  Species:
  Ancistrus sp. (L100)
  
  Caption: Dorsal fin
• 
  Species:
  Ancistrus sp. (L327)
  
  Caption: Dorsal fin
• 
  Species:
  Hemiancistrus sp. (L128)
  
  Caption: Dorsal fin
• 
  Species:
  Hypancistrus furunculus
  
  Caption: Dorsal fin
• 
  Species:
  Hypostomus sertanejo
  
  Caption: Dorsal fin
• 
  Species:
  Lithoxancistrus orinoco
  
  Caption: Dorsal fin
• 
  Species:
  Pseudacanthicus sp. (L063)
  
  Caption: Dorsal fin
• 
  Species:
  Pseudohemiodon lamina
  
  Caption: Dorsal fin
• 
  Species:
  Rineloricaria lanceolata
  
  Caption: Dorsal fin
• 
  Species:
  Synodontis angelicus
  
  Caption: Dorsal fin
• 
  Species:
  Pseudancistrus sp. (L491)
  
  Caption: Dorsal fin spine
• 
  Species:
  Pseudopimelodus atricaudus
  
  Caption: Dorsal fin spine
• 
  Species:
  Pseudopimelodus magnus
  
  Caption: Dorsal fin spine
• 
  Species:
  Mystus irulu
  
  Caption: Dorsal fin with convex dorsoposterior margin
• 
  Species:
  Baryancistrus beggini
  
  Caption: Showing rear of dorsal fin fused to front of adipose fin.
• 
  Species:
  Pterygoplichthys gibbiceps
  
  Caption: Superb dorsal fin!