Atlantic sea nettle (Chrysaora quinquecirrha), also called the East Coast sea nettle, floating in open blue water.

Jellyfish Invasion Survival Guide

Jellyfish have officially taken over Delaware beaches.

Calm, warm water has triggered a massive bloom – especially in the bay, where lifeguards have reported hundreds of stings in just a few weeks.


What to Look For

Sea nettles are the main culprit:

  • Brown tentacles
  • Clear, umbrella-like bell
  • Nearly invisible in shallow water

Also spotted:

  • Moon jellies (mild or no sting)
  • Lion’s mane (rare but painful)

If You Get Stung

Act fast:

  • Rinse with vinegar or saltwater (never fresh water)
  • Remove tentacles with tweezers
  • Apply shaving cream (Barbasol works), then gently scrape
  • Use hot water (not scalding) to reduce pain
  • Severe reaction? Take Benadryl or seek medical care
  • And no, don’t pee on it – that’s a myth and can make it worse

How to Stay Sting-Free

  • Avoid murky water and inlets, especially after rain
  • Wear rashguards, wetsuits, or stinger suits
  • Use Safe Sea lotion for an added barrier
  • Don’t touch jellyfish – even beached or dead ones can still sting
  • Stay alert in warm, shallow water on calm, sunny days

Jellyfish Facts

  • Not fish, and not jelly – they’re 94% water
  • They can’t swim; they float with tides and currents
  • Found in every ocean, from the Arctic to the tropics
  • Eaten by sea turtles, whale sharks, and (in this case) your weekend plans

Photo vs. Reality:
This backlit aquarium photo makes the Atlantic sea nettle look dramatic – and honestly, a little terrifying. But in real life, they’re much paler, almost translucent, and nearly impossible to spot in the water.

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