| Spanish | English |
| babosa de río | freshwater blenny (Blennius fluviatilis, Salaria fluviatilis) |
| blenio de río | freshwater blenny (Blennius fluviatilis, Salaria fluviatilis) |
| cangrejo de río | river crayfish (Astacus pallipes, Austropotamobius pallipes(Lereboullet,1858)) |
| cangrejo de río de Australia | Australian crayfish (Euastacus serratus) |
| cangrejo de río de patas rojas | noble crayfish (Astacus astacus) |
| cangrejos de río | crayfishes (Astacus spp., Austropotamobius spp.) |
| ecosistema de las márgenes de los ríos | river margin ecosystem |
| langostino de río americano | freshwater prawn (Macrobrachium carcinus) |
| langostinos de río americanos | American crayfishes (Orconectes) |
| lota de río | eel pout (Lota lacustris, Lota lota, Lota maculosa) |
| lota de río | burbot (Lota lacustris, Lota lota, Lota maculosa) |
| mejillón de río | river mussel (Pollicepes pictorum, Unio pictorum) |
| mejillón de río | freshwater mussel (Pollicepes pictorum, Unio pictorum) |
| molusco de río | fresh water mollusc |
| rio con Glaucion flavi | river with Glaucion flavi |
| rio de caudal intermitente | intermittently flowing river |
| rio de caudal permanente | constantly flowing river |
| rio de zona premontañosa | sub-mountainous river |
| rio subalpino | sub-Alpine river |
