For reference all about a Gothic metal band, see Sirenia (band)

A Sirenia come fully aquatic, herbivorous mammals that inhabit rivers, estuaries & coastal marine waters. Usually known as manatees, dugongs, or seacows, it stand major aquatic adaptations: forelimbs have modified into arms utilized for steering, the rump has modified into a paddle utilized for propulsion, hindlimbs (legs) come however Deuce little remnant bones swimming deep in the muscle. It come out fat, however come spindle-shaped & hydrodynamic. Skulls come extremely modified for ingesting breaths at a water supply's surface & dentition is greatly reduced. It use sole 2 mamilla, placed under their forelimbs, similar to elephants (look at a picture of manatee mother/calf pair).

Trichechus manatus (Trichechidae) and dugong dugon (Dugongidae) are endangered mintage. Wholly quadruplet dwelling metal money come vulnerable to extinction from either home ground loss & more veto impacts related to human being people incubation & coastal development. Trichechus manatus & dugong dugon come a just marine mammalian classified when herbivores. Unlike a more marine mammalian (dolphins, whales, seals, sea lions, sea otters, walruses, and polar bears) sirenians sole eat seagrasses & more aquatic vegetation. Unlike more marine mammalian, sirenian mammal own an extremely sale metabolism and zero tolerance for cold water. Prefer dolphins & whales, trichechus manatus & dugong dugon come wholly aquatic mammals that never leave a water supply - does'nt possibly to give birth. A combination one factors means that sea cow come restricted to caring shallow coastal waters, estuaries, and lakes, by using fit ecosystems that support big numbers of seagrass and/or more vegetation.

A Trichechidae differ from a Dugongidae in a shape of the skull and the shape of the fanny.

Sequentially SIRENIA Personal Prorastomidae (out) Personal Protosirenidae (out) Personal Dugongidae Dugong, Dugong dugon Steller's Sea Cow, Hydrodamalis gigas (extinct) Personal Trichechidae West Indian Manatee, Trichechus manatus West African Manatee, Trichechus senegalensis Amazonian Manatee, Trichechus inunguis