Kelgian

Kelgians (physiological classification DBLF) are a sapient, furry, caterpillar-like alien species native to the planet Kelgia and one of the several known members of the Galactic Federation. Despite their appearance, Kelgians are physiologically very similar to Earth Humans (classification DBDG) and require similar environmental conditions.

Biology and Society
Kelgian are warm-blooded, oxygen-breather omnivores and bear a more than passing resemblance to an oversized caterpillar with a beautiful silvery fur covering. They walk by undulating their bodies over their several pairs of short legs. The head is conical in shape and the forelimbs end in three manipulating digits.

Kelgians are best known for their complex, involuntary body language. They have four extendable eyestalks, a pair of hearing antennae and a highly variable fur coating; all of which respond in such a subtle and uncontrollable manner to their emotional state that they could almost be considered telepaths among themselves. As such, Kelgians completely lack concepts of lying, diplomacy or tact. They will always say what they think, for good or for bad. Kelgians have no skeletal tissue other than a thin and fragile case protecting the brain. Instead, their vital organs are enclosed by a hollow muscular envelope which also allows them to move about, in their typical undulating gait. Their circulatory system is extremely complex, including a net of blood vessels running just below the skin, to provide oxygen for the outer musculature. As a result, Kelgians are particularly vulnerable to cuts. Wounds that would be considered superficial by other species are often lethal to them. To make matters worse, their fur will never recover after being damaged; leaving the wounded individual both physically and socially awkward. Kelgian blood is red, indicating that haemoglobin is present; and their blood pressure is higher than in Humans. They are herbivorous, dioecious and monogamous; and their overall philosophy and temperament are not too dissimilar from Humans.

The Kelgian language mostly consists of loud, foghorn-like hoots. Their voice is not physically able to produce variable speech tones, which is probably the main reason for which they evolved a sophisticated body language to express emotions.

Trivia
Just as there are several humanoid species in the galaxy, so are there many alien species whose appearance resembles that of Kelgians. Examples of "kelgianoid" species include the Dwerlans and the larval stage of the Ians, from the Large Magellanic Cloud. So striking is the similarity that the larval Ians also receive the DBLF classification, whereas their adult counterparts are classified as GKNM.