No, it isn't. It is a herbivore, and it eats aquatic vegetation (like corals, sea grass, etc...)
no turtles do not eat manatee grass. :)
Animals that eat sea grass are Manatees, Sea Turtles, Conch es and Urchins.
manatee
A manatee is an herbivore. (yes) They usually spend their time in murky water, feeding off underwater grass beds. They can eat a tenth of their weight in a day, and their weight averages from 800-1000 pounds.
turtle grass or mongrove seeds
it eats insects
A killer whale could eat a manatee.
It eats grass by grazing
Dolphins are at the top of the food chain. They are carnivores of at least the third or fourth level.
the bandit shark eats the manatee
aquatic plants such as,algea, manatee grass and turtle grass