Tarkan (Men in Black)

Tarkans are a sapient, spacefaring alien species.

Biology
Tarkans are humanoids with three-fingered hands.

Strangely, their bodies can't be exposed to liquids. Being wet causes a Tarkan to violently explode. This doesn't actually kill them, however, as their body fragments will move towards each other to fuse together and regenerate, but the full regeneration process takes about a week.

Appearances

 * Men in Black: The Series, s01e05, "The Undercover Syndrome" (1997)