What is a "tentacle"?

A tentacle is a flexible and elongated appendage found in various animals, particularly in marine organisms such as jellyfish, squid, and octopuses. It is characterized by its slender, muscular structure and is often equipped with specialized sensory structures or suckers along its length. Tentacles serve a variety of functions depending on the species, including capturing prey, manipulating objects, or assisting in locomotion. They are highly versatile and can be actively extended, contracted, or manipulated for different tasks. The tentacles of certain species, like the tentacles of an octopus, are known for their remarkable dexterity and ability to grasp and manipulate objects with precision.