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| English | Spanish |
| giant river prawn | langostino de río (Macrobrachium rosenbergii) |
| layer under a river bed | subálveo |
| river anchoita | anchoita de río (Lycengraulis grossidens, Lycengraulis olidus) |
| river eel | anguila europea (Anguilla anguilla, Anguilla vulgaris) |
| river fishing net | redaya |
| river lamprey | lamprea de río (Lampetra fluviatilis, Petromyzon fluviatilis) |
| river pearl mussel | mejillón de agua dulce (Margaritifera margaritifera) |
| river trout | trucha de arroyo (Salmo trutta fario, Trutta fluviatilis) |
| river trout | trucha común (Salmo trutta fario, Trutta fluviatilis) |
| river trout | trucha de río (Salmo trutta fario, Trutta fluviatilis) |