SOUTH AMBOY - Rescue crews returned to a South Amboy beach today to ensure that a whale they guided into deeper waters yesterday has not returned to the shore. The 20-foot whale was spotted yesterday morning and crews managed to nudge the animal back out to sea by early afternoon. Members of New Jersey's Marine Mammal Stranding Center, the Perth Amboy Fire Department and the U.S. Coast Guard were involved in the mission. It took officials nearly four hours to lead the whale away from the shoreline. They say the animal did not appear harmed in any way.