They belong to the family of Tetraodontiformes. They may look cute but there is reason these guys made the number ten spot on our list. There are many different species of these fish and you really might want to stay away from every single one of those. The species include balloonfish, blowfish, bubblefish, globefish, swellfish, toadfish, honey toads, sugar toads and sea squab. The one we are talking about has four large teeth that crush the shells of crustaceans and mollusks; their natural prey.