
Snakes in a torpedo case

The hallucinated snakes of Cmdr. Riker in 2367
Snakes were a group of reptiles which lacked limbs. Snakes were sometimes referred to informally as serpents. Some snakes were venomous.
On Earth, there was an ancient African myth about a giant serpent called the night beast. (ST: "The Girl Who Made the Stars")
The 22nd century Earth Starfleet survival training course involved living on recycled sweat and snake meat. (ENT: "Desert Crossing")
In the mid-22nd century, Hoshi Sato and two other teachers from Amazon University took a hydro-skimmer to visit a tributary of the Amazon River. Sato saw sloths, pink dolphins, and many kinds of snakes there, which frightened her a lot. (ENT: "Fight or Flight")
A snake that would fall down on a hapless victim when a doorbell was pulled was part of the Sherlock Holmes holographic story that Data and Geordi La Forge ran in 2365. (TNG: "Elementary, Dear Data")
When Commander Riker was suffering from acute lack of REM sleep in 2367, he hallucinated that there were snakes underneath his blanket. (TNG: "Night Terrors")
In 2370, the D'Arsay archive turned parts of a photon torpedo on USS Enterprise-D into living snakes. (TNG: "Masks")

A Bajoran snake
A green and white striped snake was native to the planet Bajor. Vedek Bareil saw one of these snakes during an Orb experience in 2370. (DS9: "The Collaborator")

A snake from planet Soukara
A yellow snake species was also native to the planet Soukara. Jadzia Dax and Worf encountered one of them during their mission on Soukara. (DS9: "Change of Heart")
Trakor's Third Prophecy made reference to vipers, indicating the existence of snakes on Bajor. (DS9: "Destiny")
Types of snakes and serpents
- Aldebaran serpent
- Anaconda
- Arboreal needle snake
- Draxxan cloud viper
- Filian python
- Fire snake
- Ophidian
- Serpent of Xol
- Serpent worm
- Rattlesnake
- Spitting cobra
- Sun viper
- Sur-snake
- Wentlian condor snake