Andalites are a fictional alien species from the book series Animorphs, created by K.A. Applegate. They are known for their unique physical appearance, which includes a horse-like body, a long tail with a blade, and four eyes that provide excellent vision. Andalites are highly intelligent and possess advanced technology, including the ability to morph into other creatures. In the series, the Andalites are portrayed as a noble race that values freedom and justice. They are engaged in a war against the parasitic species known as Yeerks, who seek to enslave other beings. The Andalites' struggle for survival and their efforts to protect other species are central themes in the Animorphs storyline.