Their World

Every once in a while, Mother Nature reminds us that the majesty surrounding us is not completely benign. A day at the beach isn’t just, you know, a day at the beach — dangers abound, and a wise beachgoer approaches the beautiful stretch of sea and sand with respect and caution.

This spring and early summer, there have been reports that rip currents have been frequent along the oceanfront. The ocean’s power isn’t to be trifled with, and beyond the punishing power of the waves is the surprising strength of unseen currents, which can pull a swimmer or bather into deeper water quickly. Never go into the ocean without knowing the best way to handle it if it happens — don’t panic, and swim parallel to shore.

But there are other dangers. Warming waters and sea currents have brought the Portuguese man o’ war into local waters and onto beaches here. This siphonophore — it’s not a jellyfish — has tentacles and polyps beneath its float that average 30 feet in length and can grow to 100 feet, and they can sting even weeks after washing ashore. The sting is painful and can be dangerous for people with allergies. They’re beautiful, but — stay well away.

The headliners lately are sharks. Despite the headlines, the incidents show that most bites, even those involving sharks, are not life threatening. Still, sharks and other sea creatures make mistakes, too, and while they aren’t antagonistic toward humans, they might mistake a body part for a tasty morsel, especially when there’s plenty to eat near shore.

Two pieces of advice: Always swim at a lifeguarded beach. And have fun but be cautious. Remember: It’s their world — we’re just swimming in it.