Chelidonura hirundinina is a species of small and colorful aglajid sea slug, a shell-less opisthobranch gastropod mollusk in the family Aglajidae.

This is a tropical species which lives in the western Indo-Pacific, and also in the Caribbean Sea.

There are blue, black, and orange stripes on the body, and there is a white marking towards the posterior end of the animal.

They have also well-developed sensory cilia on the anterior edge of the head which are used to find the prey.

The specific epithet hirundinina is Latin, meaning "little swallow", in reference to this swallow-tailed appearance.