This is the 16461st most frequent Russian word.
рыбы
"Рыбы" means "fish" in English.
Here 'рыбы' is used as a plural noun representing multiple fish individually.
В аквариуме плавают красочные рыбы.
Colorful fish swim in the aquarium.
In this sentence, 'рыбы' collectively refers to fish species living in the sea.
Морские рыбы обитают в солёной воде.
Sea fish live in salt water.
Here 'рыбы' denotes fish as food, implying a certain quantity or number.