
1) Animal order 2) Order sirenia
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https://www.crosswordclues.com/clue/sirenia

†Prorastomidae The Sirenia (commonly referred to as sea cows) are an order of fully aquatic, herbivorous mammals that inhabit swamps, rivers, estuaries, marine wetlands, and coastal marine waters. Four species are living, in two families and genera. These are the dugong (one species) and manatees (three species). Sirenia also include Steller`s ....
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http://en.wikipedia.org/wiki/Sirenia

• (n. pl.) An order of large aquatic herbivorous mammals, including the manatee, dugong, rytina, and several fossil genera.
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http://thinkexist.com/dictionary/meaning/sirenia/

<zoology> An order of large aquatic herbivorous mammals, including the manatee, dugong, rytina, and several fossil genera. ... The hind limbs are either rudimentary or wanting, and the front ones are changed to paddles. They have horny plates on the front part of the jaws, and usually flat-crowned molar teeth. The stomach is complex and the i...
Found on
http://www.encyclo.co.uk/local/20973
Si·re'ni·a noun plural [ New Latin ]
(Zoology) An order of large aquatic herbivorous mammals, including the manatee, dugong, rytina, and several fossil genera. » The hind limbs are either rudimentary or wanting, and the front ones are changed to paddles. They have horny plates on the front ...
Found on
http://www.encyclo.co.uk/webster/S/109

The Sirenia (sea-cow) is an order of Eutheria. They are large herbivorous animals adapted to life in shallow sea.
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http://www.probertencyclopaedia.com/browse/BSA.HTM

[
n] - manatees
Found on
http://www.webdictionary.co.uk/definition.php?query=Sirenia
order Sirenia noun an animal order including: manatees; dugongs; Steller`s sea cow
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.