A jellyfish is a sea creature that has a clear soft body and can sting you.
jellyfish in British English
(ˈdʒɛlɪˌfɪʃ)
nounWord forms: plural-fish or -fishes
1.
any marine medusoid coelenterate of the class Scyphozoa, having a gelatinous umbrella-shaped body with trailing tentacles
2.
any other medusoid coelenterate
3. informal
a weak indecisive person
jellyfish in American English
(ˈdʒɛliˌfɪʃ)
nounWord forms: pluralˈjellyˌfish or ˈjellyˌfishes
1.
any of various free-swimming, mostly marine cnidarians (esp. class Scyphozoa) with a body made up largely of jellylike substance and shaped like an umbrella: it has long, hanging tentacles with stinging cells on them