According to authorities the 2-year-old was wading in about one foot of water in the Seven Seas Lagoon when the gator grabbed him around 9:30 Tuesday night.
His father tried to grab the child from the gator, but was unsuccessful.
About 50 people, including marine units, are involved in the search.
So far four alligators have been caught and euthanized.
Read more: http://nbcnews.to/21mtOVr