Leech creature seen near Spock’s torpedo coffin on the Genesis Planet in Star Trek III: The Search for Spock

(Paramount, 1984) Silicone “leech” creature with airbrushed color markings, measuring approx. 11 in. long. A group of these leech-like alien creatures were seen by Spock’s torpedo coffin when the landing party arrived on the Genesis Planet, after which they discover that Spock’s corpse is missing.