CORALS & JELLIES

Cnidarians such as jellyfish and corals have stinging cells called nematocysts. When touched they eject barbed threads tipped with poison.
FPO
Featured

How Jellyfish Work

Although jellyfish have been around for over 650 million years, they're still very mysterious. Learn the all about the fascinating jellyfish life cycle.

1-6 of 6
  • Do jellyfish have the deadliest venom in the world?

    Do jellyfish have the deadliest venom in the world?

    As you observe jellyfish twirl underwater, it's difficult not to be mesmerized by their graceful movements. But if their tentacles touch your skin, you'll regret being anywhere near these gelatinous blobs. See more »

  • How Coral Reefs Work

    How Coral Reefs Work

    How do coral polyps mere millimeters in length form the world's largest living structures? Will these giants of the sea last much longer if the present rate of destruction continues? See more »

  • How Jellyfish Work

    How Jellyfish Work

    Although jellyfish have been around for over 650 million years, they're still very mysterious. Learn the all about the fascinating jellyfish life cycle. See more »

  • The Ultimate Coral Reef Quiz

    The Ultimate Coral Reef Quiz

    For an underwater tourist, whether in a wetsuit or in front of a TV, a major attraction is a coral reef, an amazing ecosystem inhabited by myriad colorful marine creatures. Unfortunately, coral reefs are in danger of disappearing unless immediate steps are taken to preserve this natural wonder. Take this quiz to learn more about what needs to be done. See more »

  • The Ultimate Jellyfish Venom Quiz

    The Ultimate Jellyfish Venom Quiz

    The jellyfish is an unusual and fascinating marine animal. Despite its semi-transparent, gelatinous appearance the jellyfish has a painful, venomous sting if you come into contact with one of its tentacles. Take this quiz and learn more about this unique sea creature. See more »

  • How to Treat a Jellyfish Sting

    How to Treat a Jellyfish Sting

    You're going on vacation to a place where jelly fish stings are a common occurrence and you want to know how to treat a jellyfish sting. This article will tell you how to treat a jellyfish sting. See more »

1-6 of 6
  • Most Popular