The Lagoon (south beach) is calm. But, be advised there are some unusual (to me anyway) marine animals in the water. We noticed what looked like ragged brown plastic bags floating about a foot and a half under water. Thought we'd be kind and remove the garbage. Upon getting hold of it, discovered it was a type of jellyfish we've never seen at home or anywhere else in the Caribbean. Luckily, although we were stung, it had a very mild sting. Not sure how bad it would be to small children though.