What could cause a brown vertical line and horizontal ridges on one side of only one fingernail? Dr. Richard Zimon Dr. Zimon More info needed: Sounds like you damaged the nail bed at some point in time.
As tigers are related to cats it would mean that mean that they are feline. A canine is a dog so tigers aren't canine. 2 people found this useful.
The biggest species of the cat family, the tiger is a solitary hunter. They can reach 3.3 meters and weigh up to 300lbs. They stalk their prey and hunt at night. Like lions, they tend to bite the throat of their prey to cut the flow of air and blood to the animals head. They have a powerful bite, nearly twice that of the lion. There are more tigers in captivity than in the wild.