Snark

Snark may be:

Fictional creatures

Snark (Lewis Carroll), a fictional animal species in Lewis Carroll's The Hunting of the Snark (1876)
Snark (Half-Life), fictional small, bug-like species of alien used as a weapon
Zn'rx, a race of fictional aliens in Marvel Comics publications, commonly referred to as "Snarks"
Corporal Snark, a minor character in Catch-22 (1961) by Joseph Heller
A species of creature in The 100 Lives of Black Jack Savage
The Snark, fictional alien machine that visits Earth in the novel In the Ocean of Night (1977) by Gregory Benford
A fictional creature from the TV series The Troop
A fictional creature from the book series A Song of Ice and Fire, fictional even in the fictional world
The sea monster from Infocom's Seastalker.

Snark, an experimental rescue submersible in the film Gray Lady Down (1978)
The Snark, a yacht described in Jack London's book The Cruise of the Snark (1911)
Snark sailboat, a small, inexpensive, and lightweight sailboat
MV The Second Snark, historically a shipyard tender, now in service as a cruise boat and ferry
USS Snark (SP-1291), a United States Navy patrol boat in commission from 1917 to 1919

Snark (graph theory), a type of graph
SNARK (theorem prover), a computer program
Snark, an Open Source BitTorrent client
Snark (2009), a book by film critic David Denby
Snark, computer game published in the book What to Do After You Hit Return or P.C.C.'s First Book of Computer Games (1977) by Bob Albrecht
Snark, a late 70s moped produced by F.I.V. Edoardo Bianchi
a combination of a tilde after a period(.~), intended to denote sarcasm.