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About Jellyfish
Cnidarians are a phylum of aquatic animals that includes jellyfish, corals, and sea anemones. They are characterized by stinging cells called cnidocytes, which can release toxins into prey or predators.
Cnidarians have existed for over 500 million years and play important roles in marine ecosystems. Coral reefs, built by millions of tiny coral polyps, provide habitat for over 25% of all marine species worldwide.
Fun Facts about Jellyfish
- • Jellyfish have no brain, heart, or blood.
- • Some jellyfish can produce bioluminescence.
- • Box jellyfish are among the most venomous creatures on Earth.
- • Jellyfish are about 95% water.
- • Some jellyfish species are considered biologically immortal.
- • Jellyfish have been around for over 500 million years, predating dinosaurs.