<P> A group of jellyfish is sometimes called a bloom or a swarm . `` Bloom '' is usually used for a large group of jellyfish that gather in a small area , but may also have a time component , referring to seasonal increases , or numbers beyond what was expected . Other collective names for a group of jellyfish are `` fluther '' and `` smack , '' though neither term is commonly used by scientists who study jellyfish . Jellyfish are `` bloomy '' by nature of their life cycles , being produced by their benthic polyps usually in the spring when sunshine and plankton increase , so they appear rather suddenly and often in large numbers , even when an ecosystem is in balance . Using `` swarm '' usually implies some kind of active ability to stay together , which a few species such as Aurelia , the moon jelly , demonstrate . </P>
<P> A group of jellyfish is sometimes called a bloom or a swarm . `` Bloom '' is usually used for a large group of jellyfish that gather in a small area , but may also have a time component , referring to seasonal increases , or numbers beyond what was expected . Other collective names for a group of jellyfish are `` fluther '' and `` smack , '' though neither term is commonly used by scientists who study jellyfish . Jellyfish are `` bloomy '' by nature of their life cycles , being produced by their benthic polyps usually in the spring when sunshine and plankton increase , so they appear rather suddenly and often in large numbers , even when an ecosystem is in balance . Using `` swarm '' usually implies some kind of active ability to stay together , which a few species such as Aurelia , the moon jelly , demonstrate . </P>
what do you call a group of jelly fish
what do you call a group of jelly fish
a bloom or a swarm
a bloom or a swarm