This is the 5926th most frequent Russian word.
рыбаков
"Рыбаков" means "fishermen" (plural).
The word 'рыбаков' refers to fishermen in the genitive plural form because it is used to indicate the group of individuals present.
Рыбаков на берегу было много, они готовились к утренней ловле.
There were many fishermen on the shore, preparing for the morning catch.
Here, 'рыбаков' is in the accusative plural form as it represents the direct object of the action 'встретил' (met).
Я встретил рыбаков возле реки, они рассказали много интересных историй.
I met some fishermen by the river, and they told me many interesting stories.
In this sentence, 'рыбаков' is in the genitive plural form, used as part of the possessive phrase 'клуб рыбаков' (fishermen's club) to show ownership.