Alligators move around and frequently relocate. There have been very rare instances of alligators at the beach. Alligators can stand salt water but prefer fresh or brackish, so an alligator at the beach is out of it's normal environment and probably lost. Just keep away from it - if possible report it. They breath air, are warm-blooded, bear live young, and suckle their young.
Mothers take care of their young during their first year.
They can grow up to 12 feet in length and 800 Lbs. in weight and can swim at speed up to 45 Mph. Since Dolphins are air breathing they are easily spotted when they surface for air. This is similar to sonar used by submarines and is called echolocation. Scientists believe dolphins communicate with each other using squeaks and whistles and are trying to learn their language with little success. Dolphins abound in the waters around Hilton Head.