21. Danger To Sea Otters
The safety of sea otters has been a concern for quite some time. At one time, over 300,000 otters called the ocean home, but, because they have such beautiful pelts, poachers targeted them and caused their population to dwindle drastically.
Thankfully though, this eventually became illegal, and the 20th century has seen an increase in sea otter numbers, and yet they still remain an officially endangered species by the International Union for the Conservation of Nature.