The Proto-Indo-European word *peisk
Word *peisk
Meaning fish
See also Latin: piscis ‘fish’
Euphratic: *peš ‘be wide’
Synonyms *dʰĝʰu-, *dhĝhuhₓ-, *pik̂sk̂os

Other words that might be of interest
*k̂on- ‘shell’, *laks- ‘salmon’, *karkr(o)- ‘crab’