conus

1 capitalized :  a very large genus (the type of the family Conidae) of tropical marine snails comprising the cones and including many harmless forms and a few chiefly in the southwest Pacific that are highly dangerous because they are capable of biting with the radula and injecting a paralytic venom that has been known to cause death in humans

2plural coni \-ˌnī, -(ˌ)nē\play :  conus arteriosus