SIRENIANS
Scrabble letter values: S1I1R1E1N1I1A1N1S1 = 9
Definition
SIRENIANS is the plural of SIRENIAN.
noun SIRENIAN: any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs.
Synonyms of SIRENIAN: sea_cow, sirenian_mammal