-they would swim
The word nadarían is the conditional form of nadar in the third person plural.
See the full nadar conjugation
Sí, mi preocupación sería que los pececillos nadarían en mi nariz.
Yeah, my concern would be that minnows would swim up my nose.
Want to Learn Spanish?
Spanish learning for everyone. For free.
The world’s largest Spanish dictionary
Conjugations for every Spanish verb
Learn vocabulary faster
Learn every rule and exception
Native-speaker video pronunciations
Word of the Day
Have you tried it yet? Here's what's included:
Learn offline on iOS
Learn Spanish faster