The "box" type of these animals have very powerful venom.
Myung Hyun developed the robotic machine JEROS to eliminate swarms of these animals that are threatening ecosystems. The unique feature of a protein discovered in this animal is due to the cyclic structure of its serine-tyrosine-glycine sequence. These animals are the cause of Irukandji syndrome. GFP, or green fluorescent protein, was first observed in one of these animals, the largest of which has certain yellow and red structures that resemble a lion's mane. The "box" type of these animals have very powerful venom. For 10 points, name these members of phylum Cnidaria that have a gelatinous umbrella-shaped body along with trailing tentacles that can sting.
Myung Hyun developed the robotic machine JEROS to eliminate swarms of these animals that are threatening ecosystems.
jellyfish [or sea jelly; or sea jellies; or medusozoas] 