Manatee

Manatee Q&A: Why do manatees scar?

Since manatee bones are so fragile, when a boat's propeller comes in contact with a manatee it can result in scratching the manatee and causing them to scar. One of the ways humans have tried to avoid this is by putting propeller caps on so they can’t slice the manatee, but this results in blunt force trauma which can cause a manatee's bones to completely shatter.

Manatees and Their Six Senses

Most of the life of a manatee is spent in very murky water and they are also active throughout the night in the dark. For this reason, manatees do not need to have perfect vision and are reported to be practically near sighted, however they have receptors for both blue and green wave lengths allowing them to see in color and can therefore differentiate between random objects and luscious green plants to eat.