If you have been stung while swimming in the ocean, you probably came in contact with a _____. Cnidarians: jellyfish Platyhelminthes: flat worms Nemotoda: round worms Mollusca: mollusks Annelida: segmented worms
Cnidarians: Jellyfish. Do not urinate on the stung though. This will only activate the stingers. Instead cool it in sea (salt) water and scrape away the remaining tentacles (or how you call it)
