Yes. Tremors…
http://www.wired.com/2013/09/absurd-creature-of-the-week-bobbit-worm/
every once in a while one just appears in an aquarium, like a kraken, ready to make a mess of things, as if Liam Neeson himself ordered it into existence. Indeed, it has become the bane of many an aquarist. When folks introduce live rocks ? which are actually skeletons of dead coral ? into their saltwater aquariums, a teeny-tiny bobbit worm can come along for the ride. But they don?t stay small for long.
Eunice aphroditois
From Wikipedia, the free encyclopedia
Eunice aphroditois.jpg
Scientific classification
Kingdom: Animalia
Phylum: Annelida
Class: Polychaeta
Order: Eunicida
Family: Eunicidae
Genus: Eunice
Species: E. aphroditois
Binomial name
Eunice aphroditois
Pallas, 1788
Eunice aphroditois (colloquially known as the Bobbit(t) worm), is an aquatic predatory polychaete worm dwelling at the ocean floor. This organism buries its long body into an ocean bed composed of gravel, mud, or corals, where it waits patiently for a stimulus to one of its five antennae, attacking when it senses prey. Armed with sharp teeth, it is known to attack with such speeds, its prey is sometimes sliced in half. Although the worm hunts for food, it is omnivorous.[1]
According to Luis F. Carrera-Parra and Sergio I. Salazar-Vallejo, ecologists specializing in annelid polychaetes at El Colegio de la Frontera Sur in Campeche, Mexico, eunicids inject “…[a] narcotizing or killing toxin in their prey animal, such that it can be safely ingested ? especially if they are larger than the worm ? and then digested through the gut”.[2] They further state, unlike a different family of worms, the fireworms (Amphinomidae), which have harpoon-shaped chaetae (bristles) that release a toxin that can cause severe skin irritation, E. aphroditois specimens "do not have abundant chaetae and their chaetae are not used for defensive purposes, but for improving traction for crawlin