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Many venomous animals, such as this blue ringed octopus (genus Hapalochlaena), are brightly colored or can display bright colors to warn potential predators.

Venomous animals are animals that have a gland or glands for secreting venom; able to inflict a poisonous bite or sting.

Arachnids

Cephalopods

Cnidaria

  • Jellyfish  sting using microscopic cells called nematocysts, which are capsules full of venom expelled through a microscopic lance. Contact with a jellyfish tentacle can trigger millions of nematocysts to pierce the skin and inject venom.
  • Portuguese Man o' War
  • Sea Anemones
  • Some Corals

Crustacean

  • The remipede Xibalbanus tulumensis  looks like a white centipede with a long segmented body and scores of legs which display a swimming motion. They live in underground caves of Mexico and Central America. Although blind, they are formidable predators, and feed on the shrimp that share their underground pools.

Dinosaurs

  • Some scientists have proposed that Sinornithosaurus  had a venomous bite, but recent evidence suggests otherwise.

Fish

There are at least 1,200 species of venomous fish, and they include:

Insects

Mammals

Reptiles

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