Can confirm - I did that as a child (with my uncles) in another soviet country. That, and electrofishing by tasing those poor Nemos. To this day I don’t know why we used those methods, but it was mad fun. Maybe literally.
Did you stuff the dynamite into the fish? That is what Borin told me these guys did. Then, you throw the fish into the water? At that point, their fishy friends come up and say "Jeez Svetlana, you looked bloated!" And, then BOOM, the fish all fly out of the water given the large blast zone.
Yikes. No, we'd look for a shoal of fish, then throw a homemade explosive in the middle. Still horrible.
It was really funny to be driving in the dark from the Dubrovnik airport and hearing this cab driver in very limited English describe what he was seeing.
I think Crocodile Dundee did this on the Hudson river, too.