Snakes are a group of reptiles that lack limbs. Snakes are sometimes referred to informally as serpents. Some snakes are venomous.
The Earth Starfleet survival training course involved living on recycled sweat and snake meat. (ENT: "Desert Crossing")
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 imagined 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")
The group of snakes included garter snakes, rat snakes, and milk snakes, all common and harmless.
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")
The snake in Bareil's vision was an emerald tree boa (Corallus caninus).
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")
The snake on Soukara was an albino Burmese python (Python molurus bivittatus), a color variant popular in the pet trade.
Trakor's Third Prophecy makes reference to vipers, indicating the existence of snakes on Bajor. (DS9: "Destiny")
Types of snake
Sentient snake-like species