| Subject | Spanish | English |
| chem. | amasadora con brazo cola de pez | fish-tail type kneader |
| chem. | amasadora en forma de cola de pez | fish-tail type kneader |
| chem. | amasadora en forma de cola de pez | Double-Naben kneader |
| chem. | cola de pez | fish-glue |
| gen. | cola de pez | fishtail |
| mech.eng., construct. | compuerta abatible de "vientre de pez" | fish belly flap gate |
| earth.sc., mech.eng. | evaporador en división de pez | herringbone-type evaporator |
| earth.sc., mech.eng. | evaporador en división de pez | V-coil evaporator |
| org.name. | Grupo Especial de Trabajo sobre el Pez Volador del Caribe Oriental | Ad Hoc Flying fish Working Group of the Eastern Caribbean |
| nat.sc., agric. | larva de pez | hatchling |
| patents. | materiales de construcción no metálicos, tubos rígidos no metálicos para la construcción, asfalto, pez y betún, construcciones transportables no metálicas, monumentos no metálicos | building materials non metallic, non-metallic rigid pipes for building, asphalt, pitch and bitumen, non-metallic transportable buildings, monuments, not of metal |
| med. | meato de boca de pez | fish-mouth meatus |
| fish.farm. | parte carnosa de un pez abierto | face |
| nat.sc., agric. | pez de agua caliente | warm water fish |
| nat.sc. | pez de agua dulce | fresh water fish |
| gen. | pez de agua dulce | freshwater fish |
| nat.sc., agric. | pez de agua salada | sea-water fish |
| gen. | pez de agua salada | saltwater fish |
| industr., chem. | pez de alquitrán | wood tar pitch |
| chem. | pez de alquitrán | coal tar pitch |
| chem. | pez de alquitrán | tar pitch |
| chem. | pez de alquitrán de madera | wood-tar pitch |
| industr., chem. | pez de alquitrán vegetal | wood tar pitch |
| industr., chem. | pez de alquitrán vegetal | wood pitch |
| nat.sc., agric. | pez de arena japonés | sailfin sandfish (Arctoscopus japonicus) |
| nat.sc., agric. | pez de arena japonés | Japanese sandfish (Arctoscopus japonicus) |
| fishery | pez de arrecife | reef fish |
| chem. | pez de Borgoña | Burgundy pitch |
| fish.farm. | pez de canal | channel fish |
| ichtyol. | pez de escama | truefish |
| ichtyol. | pez de escama | finfish |
| fish.farm. | pez de escama | scale fish |
| fish.farm. | pez de estanque | pond fish |
| fish.farm. | pez de fondo | ground fish |
| fishery | pez de fondo | whitefish |
| fishery | pez de fondo | white fish |
| fish.farm. | pez de madurez sexual | ripe fish |
| nat.sc., agric. | pez de pesca deportiva | game fish |
| entomol. | pez de plata Lepisma saccharina | fish moth |
| fish.farm. | pez de plata | scabbard fish (Lepidopus caudatus (Euphrasen,1788), Lepidopus xantusi (Goode and Bean,1895)) |
| fish.farm. | pez de plata | silver scabbardfish (Lepidopus caudatus (Euphrasen,1788), Lepidopus xantusi (Goode and Bean,1895)) |
| fish.farm. | pez de plata | scabbardfish (Lepidopus caudatus (Euphrasen,1788), Lepidopus xantusi (Goode and Bean,1895)) |
| entomol. | pez de plata Lepisma saccharina | silverfish |
| life.sc., fish.farm. | pez de plata grande | greater silver smelt (Argentina silus) |
| fish.farm. | pez de poco valor | coarse fish |
| genet. | pez de prueba | test fish |
| fish.farm. | pez de San Franciso | lizardfish (Synodus saurus) |
| fish.farm. | pez de San Franciso | Atlantic lizardfish (Synodus saurus) |
| fish.farm. | pez de San Pedro | Peter fish (Zeus faber (Linnaeus), Zeus japonicus, Zeus pungio) |
| fish.farm. | pez de San Pedro | dory (Zeus faber (Linnaeus), Zeus japonicus, Zeus pungio) |
| fish.farm. | pez de san pedro | john dory (Zeidae, Zenopsis ocellata, Zeus capensis, Zeus faber, Zeus japonicus) |
| fish.farm. | pez de San Pedro | John Dory (Zeus faber (Linnaeus), Zeus japonicus, Zeus pungio) |
| nat.res., fish.farm. | pez de San Pedro | Atlantic John Dory (Zeus faber, Zeus pungio) |
| life.sc., fish.farm. | pez de San Pedro | John dory (Zeus faber, Zeus japonicus, Zeus pungio) |
| fish.farm. | pez de San Pedro americano | American John Dory (Zenopsis conchifera (Lowe), Zenopsis ocellata) |
| fish.farm. | pez de San Pedro americano | silvery John dory (Zenopsis conchifer) |
| nat.res., fish.farm. | pez de San Pedro americano | silvery John Dory (Zenopsis conchifer) |
| fish.farm. | pez de un año | yearling of fish |
| chem. | pez de ácidos grasos | fatty acid pitch |
| nat.sc., agric. | pez luna de la India | moonfish (Mene maculata) |
| oil, mech.eng. | trépano en cola de pez | fishtail bit |
| oil, mech.eng. | trépano en cola de pez | fish tail bit |
| construct. | viga en vientre de pez | fish bellied truss |
| construct. | viga "en vientre de pez" | fish-bellied girder |
| construct. | viga en vientre de pez | fish bellied girder |
| construct. | viga en vientre de pez | fish bellied beam |
