S1I1R1E1N1I1A1N1
8 points
SIRENIAN is validvalid
any of an order of aquatic mammals [n SIRENIANS]
any of an order of aquatic mammals including the manatee and dugong [n -S]
any of an order of aquatic mammals [n SIRENIANS]
any of an order of aquatic mammals including the manatee and dugong [n -S]