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Marine Life - Hazardous marine organisms Corals
belong to the animal division called Cnidaria. Jellyfish and their relatives also belong to the animal division Cnidaria. Some species like Box Jellies and Portugese Man of War contain a strong toxin in their nematocysts. When discharged this toxin can produce a serious reaction. Moray eels are common in Hawaii. When harassed or intruded upon, these animals may react, using their sharp teeth. Bacterial infections are common with eel bites.
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© 2003-2004 Hanauma Bay Education Program,
University of Hawaii Sea Grant Extension Service Last updated
March 17, 2008
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These
animals are named after their stinging cells or cnidae. Corals are sharp,
contact may cause lacerations or skin irritation. 
Urchins or Wana have sharp spines. These spines easily penetrate
skin, yet are very hard to remove as they often fragment. Wana
spines can cause painful infections or inflammation. In some species,
spines can be venomous. It is best to avoid standing in the water if possible.
