Siren scales - Killing machines - Have gills & live in the sea - Very wide vocal range - Communicate underwater with humming and clicks - Very loose society. No kings or queens - Terrorize (& prey on) Nearly every tribe - Scales range to red to blue and from grey to black - Usally will have a variety of bright markings - Red or orange eyes but yellow can be rarely seen - About 4000 pounds - Teeth constantly replace