In Japan, around May 5th (Children's Day) these stylized carp streamers are all hanging around, blowing in the wind. It's the boy's part of Children's Day. The carp represents a strong male, like the fish I guess.
Koinobori - Carp Streamers free icon was designed by j4p4n for icons Png and presented to its users.
j4p4n
12/13/2017