Animals | Wild Animals | Corals & Jellies

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

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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.


How to Treat a Jellyfish Sting

How to Treat a Jellyfish Sting

How to Treat a Jellyfish Sting. Check out HowStuffWorks to learn more about jellyfish and how to treat a jellyfish sting. See more »

The Ultimate Coral Reef Quiz

The Ultimate Coral Reef Quiz

The coral reef is an amazing, but threatened, ecosystem, with myriad marine life. Take this quiz to learn about preserving the world's coral reefs. See more »

The Ultimate Jellyfish Venom Quiz

The Ultimate Jellyfish Venom Quiz

The jellyfish is an unusual animal with a powerful venom. Take this quiz to learn more about the jellyfish's painful, venomous sting. See more »

Do jellyfish have the deadliest venom in the world?

Do jellyfish have the deadliest venom in the world?

Jellyfish venom is one of the deadliest toxins on Earth. Learn how humans and other animals trigger jellyfish venom and what the cure is. See more »

How Coral Reefs Work

How Coral Reefs Work

Coral reefs are the rainforests of the sea, home to many, many marine fish species. Learn more coral reef facts and see coral reef photos and maps. See more »

How Jellyfish Work

How Jellyfish Work

Although jellyfish have been around for over 650 million years, they're stil very mysterious. Learn the basics and the jellyfish life cycle. See more »