ORANGE CITY, Fla. — The manatees are trying to stay warm to survive in the warm spring waters of Blue Spring State Park on this chilly Wednesday morning.

•  If they don't stay warm, they can get the human equivalent of pneumonia
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Blue Spring State Park counted 448 manatees were at the spring Wednesday. On Monday there were only 23.

It is necessary to keep them from getting what is known as cold stress syndrome — something like pneumonia in humans.

There are now more than seven times the number of sea cows at the park in Orange City on Wednesday morning than there were just two days ago.

Even though manatees look like they are fat or blubbery, they only have an inch of fat and have a very slow metabolism meaning they cannot easily stay warm. 

Blue Springs Spark is a sanctuary for them since the spring's water fairly constantly runs 72 degrees year round.

In fact, experts say the warm spring water is vital to their survival. They cannot deal with water that is 68 degrees or below for long periods or else they may get cold stress syndrome. 

Anyone visiting the park can see these majestic creatures in Blue Spring State Park’s crystal clear blue water.

It's not the only place where manatees congregate though. On Wednesday dozens were spotted at DeSoto Canal in Satellite Beach, a frequent hangout for manatees seeking a warm spot.