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• 
  Species:
  Loricaria lata
  
  Caption: Captured in Rio Tocantins
• 
  Species:
  Acanthicus hystrix
  
  Caption: Close-up of dorsal fin. Rio Tocantins, near town of Estreito, Maranhão state, Brazil
• 
  Species:
  Acanthicus hystrix
  
  Caption: Close-up of eye. Rio Tocantins, near town of Estreito, Maranhão state, Brazil
• 
  Species:
  Acanthicus hystrix
  
  Caption: Close-up of mouth. Rio Tocantins, near town of Estreito, Maranhão state, Brazil
• 
  Species:
  Acanthicus hystrix
  
  Caption: Close-up of odontodes. Rio Tocantins, near town of Estreito, Maranhão state, Brazil
• 
  Species:
  Acanthicus hystrix
  
  Caption: Close-up of opercular odontodes. Rio Tocantins, near town of Estreito, Maranhão state, Brazil
• 
  Species:
  Acanthicus hystrix
  
  Caption: Close-up of Pectoral fin. Rio Tocantins, near town of Estreito, Maranhão state, Brazil
• 
  Species:
  Ancistrus sp. hybrid(1)
  
  Caption: Fry of Ancistrus sp. `Rio Tocantins` (top) and Ancistrus hybrid (bottom left)
• 
  Species:
  Rhinodoras sp. `TOCANTINS XINGU`
  
  Caption: Rio Tocantins
• 
  Species:
  Baryancistrus sp. (L084)
  
  Caption: Rio Tocantins
• 
  Species:
  Acanthicus hystrix
  
  Caption: Ventral view. Rio Tocantins, near town of Estreito, Maranhão state, Brazil