I came across a school of such fishes hanging down from the ceiling of a Chinese restaurant. They surely look great and a lot like real fishes. They are made of the commonly found red pockets widely available in the Chinese communities during the Chinese New Year. I examined the fishes closely, took a number of pictures of them. When I got home I was able to reproduce a number of them.
Chinese New Year is the new year according to the movement of the moon rather than the movement of the sun. It usually takes place around late January to mid-Febuary.
Red pocket is a Chinese tradition. The elder people give out red pockets to children/teenages. There are usually money inside. Chinese children earn quite a fortune during Chinese New Year getting red pockets from their elderly family members, uncles and aunties. Of course, by the Newton's law of action and reaction, the elderly go broke at the same time. Lucky that the red pockets giving only last of 10-15 days.
Fishes are good decoration as well a dish during the Chinese New year because the Chinese pronunciation of "fish" is similar to that of "left over". One gets "left over" because (s)he has too much. Having too much is a sign of richness. So, fishes are good thing to show and to eat during Chinese New Year.
More about Chinese New Year from Wikipedia here