Most of the sea animals that can be dangerous to us are too timid to attack humans. These include the dangerous-looking reef shark and the sea snake. Although a number of fishermen die from the poisonous bite of the sea snake, the animal itself is usually too lazy to bite. Another dangerous inhabitant of the sea is the puffer fish. Some of its body parts are highly poisonous, especially the liver and ovaries. Despite this, its meat is served as a delicacy and a few people have also died because of eating incorrectly cooked puffer fish. The sea wasp is one of the most poisonous animals of the world. The stinging cells of this species of jellyfish contain a poison which can cause death within minutes. Annually, up to 70 people die because of sea wasp stings.