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Sirenia is an order of mammals. There are 7 species of Sirenia, in 4 genera and 5 families. This order has been around since the eocene epoch. It includes groups like Prorastomidae, Manatees, and Dugongs. They are herbivores. Reproduction is viviparous. They rely on lift powered swimming to move around.

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  • URI: https://eol.org/schema/terms/lift_based_swimming
  • Definition: Hydrofoils, or fins, are used to push against the water to create a normal force to provide thrust, propelling the animal through water. The reduction of fin cross-sectional area helps to minimize drag, and therefore increase efficiency. Regardless of size of the animal, at any particular speed, maximum possible lift is proportional to (wing area) x (speed)<sup>2</sup>. Dolphins and whales have large, horizontal caudal hydrofoils, while many fish and sharks have vertical caudal hydrofoils.
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EOL has data for 19 attributes, including:

Known occurrences, collected specimens and observations of Sirenia. View this species on GBIF