VIDEO: Manatees huddle together to stay warm during chilly morning temperatures

• Hundreds of manatees huddled together at Three Sister Springs in Crystal River on Friday, trying to stay warm during chilly morning temperatures.
• Temperatures at the Weather Stem Station in Crystal River dropped to the mid-30s in the morning hours of Jan. 16. Luckily, the waters in the springs stay at 72 degrees year-round.

WATCH: Manatees huddle together to stay warm during cold morning temperatures

• The manatees gather in the springs and in the waters outside Tampa Electric's Big Bend Power Station in Apollo Beach when temperatures drop because they can develop a life-threatening condition called cold stress when the waters drop below 68 degrees.
• Tampa Bay 28 flew a drone over the Three Sister Springs on Friday morning.