"Kot i ryba"

Translation: A cat and a fish

[Gatu77]

Soon there will be only cat kot.

[EvelinaPuhs]

Am I only one who heard "kot je ryba"?

[Jellei]

I guess it may sound a bit like "Kot ji ryba"...

[usefulingo]

so "kot je ryba" is grammatically incorrect and for it to make sense the accusative is needed, right? (either "kot je rybę/ryby" or "kota/koty je ryba")

[Jellei]

Yes.

The second example, which means "The cat(s) is/are eaten by a fish", is something that you are rather unlikely to hear, such a word order is mostly used to show the word order flexibility coming from the grammatical cases, but the fact that it's correct doesn't mean it's natural ;)

[Marcus374095]

Ryba sounds like 'river'

[Apurve3]

Ryba means Fish and what does Fishes means?

[Jellei]

"ryby"

[EvelinaPuhs]

Fish is both singular and plural form. Fishes usually refer to different species of fish.