1. a large aquatic mammal of the order Sirenia, including manatees and dugongs
Usage: zoological

1. relating to or characteristic of sirenians
Usage: zoological

Examples

• The manatee is a gentle sirenian found in warm coastal waters.
• Sirenians are herbivorous marine mammals that graze on seagrass.
• The dugong is the only sirenian species found in the Indo-Pacific region.
• Scientists study sirenian behavior to better understand these endangered animals.
• The sirenian fossil record shows these mammals evolved from land animals.
• Sirenian populations have declined due to habitat loss and boat strikes.