Manatee

1. The common name denoting a fully aquatic, dark grey creature that is largely herbivorous. Manatees can weigh up to 1,000 lbs and have an average lifespan of upwards of 60 years (in the wild). Manatees use their paddle-tails and flippers to navigate through the water. They are very gentle creatures and often exhibit friendly behavior around humans.

Manatees are also known as sea cows. They belong in the genus Trichechus, which contains three surviving species.
Threats that beset manatees include pollution, irresponsible fishing, and climate change, all of which are deleterious to their habitat and means of recourse.

1. Snooty—who unfortunately passed away in 2017, two days after his 69th birthday—was the world's oldest manatee.