A female harbor seal found stranded on an Ocean City beach in January, and released March 3 after treatment at the National Aquarium, has moved more than 600 miles up the East Coast.

"Secca" was equipped with a satellite tracking device, released onto the same beach where she was found, and swam off into the surf. She loafed around in Delaware Bay for a while, then headed north and east. At last check on Monday, she was swimming off the island of Martha's Vineyard, Mass.  You can track her progress here.

Secca ("dry" in Italian, for her preference for being out of the water while at the aquarium), was injured, emaciated and dehydrated when found. The aquarium staff fattened her up on a diet of herring and capelin, and packed 30 pounds on her by the time she was returned to the sea. She was the 80th wild animal treated and released by the National Aqarium. 

Here's more.