| Subject | German | Spanish |
| life.sc., fish.farm. | Atlantischer Blauer Marlin | marlín azul (Makaira nigricans) |
| life.sc., fish.farm. | Atlantischer Blauer Marlin | aguja azul (Makaira nigricans) |
| chem. | blauer Asbest | crocidolita |
| nat.res. | blauer Brummer | mosca azul de la carne (Calliphora erythrocephala, Lucilia sericata) |
| med. | blauer Eiter | pus azul |
| environ. | Blauer Engel | etiqueta ecológica |
| environ. | Blauer Engel | Ángel Azul |
| nat.res., agric. | blauer Erlenblattkaefer | crisomela del aliso (Agelastica alni) |
| med. | blauer Fleck | mancha cerúlea (macula caerulea) |
| med. | blauer Fleck | mancha azul (macula caerulea) |
| med. | blauer Hochdruck | hipertensión cianótica |
| med. | blauer Husten | tos con cianosis |
| pharma. | blauer Kasten | cuadro azul |
| fish.farm. | Blauer Katfisch | perro azul (Anarhichas denticulatus, Anarhichas latifrons) |
| life.sc., fish.farm. | Blauer Marlin | marlín azul (Makaira nigricans) |
| life.sc., fish.farm. | Blauer Marlin | aguja azul (Makaira nigricans) |
| med. | blauer Naevus | macula caerulea |
| med. | blauer Naevus | mancha azul |
| med. | blauer Naevus | nevo azul |
| nat.sc., agric. | blauer Natterkopf | viborera morada (Echium vulgare) |
| nat.sc., agric. | blauer Natterkopf | hierba azul (Echium vulgare) |
| hobby, transp. | Blauer Peter | Blue Peter |
| nautic. | Blauer Peter | bandera de salida (internationale Signalflagge) |
| med. | blauer Scheintod | asfixia cianótica |
| med. | blauer Schweiss | sudación azul (indicanhidrosis) |
| med. | blauer Schweiss | indicanhidrosis |
| fish.farm. | Blauer Seewolf | perro azul (Anarhichas denticulatus, Anarhichas latifrons) |
| nat.res., fish.farm. | blauer Sonnenbarsch | mojarra de agallas azules (Lepomis macrochirus) |
| nat.res., fish.farm. | blauer Sonnenbarsch | perca agalla azul (Lepomis macrochirus) |
| nat.res., fish.farm. | blauer Sonnenbarsch | agalla azul (Lepomis macrochirus) |
| fish.farm. | Blauer Stöcker | jurel (Trachurus picturatus (Bowdich)) |
| fish.farm. | Blauer Stöcker | chicharro (Trachurus picturatus) |
| life.sc., environ. | blauer Sumatra-Fliegenschnapper | papamoscas de Rueck (Cyornis ruckii) |
| chem. | blauer Vitriol | vitriolo azul |
| fish.farm. | Blauer wittling | bacaladilla (Micromesistius australis, Micromesistius poutassou, gadus poutassou) |
| food.ind. | blauer Wittling | merlán |
| life.sc., fish.farm. | Blauer Wittling | bacaladilla (Micromesistius poutassou, Gadus poutassou) |
| nat.res., fish.farm. | blauer Ziegelbarsch | blanquillo camello (Lopholatilus chamaeleonticeps) |
| nat.sc., agric. | Blauer Ziegelbarsch | blanquillo camello (Lopholatilus chamaeleonticeps) |
| nat.res. | Indo-pazifischer Blauer Marlin | aguja azul del Indo-Pacífico (Makaira mazara) |
| agric. | Schnittflächen blauer Flecke | corte oscuro |