Multiple choice general knowledge The tentacles of the giant Arctic jellyfish can reach 120 feet (36.6 meters) in length. True False Reveal answer Fill a bubble to check yourself A Correct answer Explanation The lion's mane jellyfish, often found in Arctic waters, is known as the largest species of jellyfish in the world. Its tentacles can indeed reach lengths of up to 120 feet or more, enabling it to catch prey effectively.