What is another word for kettle-fish?
Pronunciation: [kˈɛtə͡lfˈɪʃ] (IPA) 
"Kettle-fish" is a term used to describe a group of fish that swim together in a circular pattern. Other synonyms for this term include "bait ball", "fish tornado", and "shoal." These terms are often used to describe the behavior of small prey fish such as sardines, anchovies, and herring. These fish typically swim together in large groups as a means of protection against predators. By forming a tight ball, they make it more difficult for predators to single out an individual fish. Observing a kettle-fish is a fascinating sight as the fish move in unison, often creating dramatic swirls and vortexes in the water.
