According to Official Guinness Records,
The largest display of origami whales consists of 3,374 origami whales and was achieved by Marineland Animal Defense (Canada) in Niagara Falls, Ontaria, Canada, on 18 May 2013. The record holder was inspired by an ancient Japanese legend that promises anyone who folds a thousand origami cranes will be granted a wish by a crane.
For a complete list of 2013 records, please visit 2013 Guinness Records in Canada.