One of the oldest sea life-forms, the sea monarchs are some of the most deadly creatures on the planet. They are very large jellyfish, in the same size class as the lion's mane jellyfish, the largest cnidarian in the world. The diameter of one fully-grown is slightly greater than the height of an average fully grown man. These creatures have been found throughout the globe, often acting together in hers, and working collectively to capture prey. Often some swarm clouds have been recorded as large as 100m-500m. In many cases these creatures have been able to bring down creatures much larger than the individual portions.
Individually each creature is often larger than a grown human being. Growing up to 2 meters (6 feet 7 inches) in diameter and weighing up to 300 kilograms (ca. 660 pounds)
Many sailors will report that these creatures can often swarm and attack even large ocean-going vessels. Stories have been told throughout the centuries of sailors being stuck in the middle of the oceans, after being swarm attacked by these creatures.
There are 3 prevailing scientific theories that explain the swarm behavior of the sea monarchs. One theory is that the creatures are attracted to the electrical field generated by living organisms. This would explain the disproportionate number of sea monarchs found dead after lightning storms. Sea monarchs in captivity have been known to attack car batteries that have fallen into tanks. A second theory is that the sea monarchs, much like the sharks attack based on heat detection. The problem with this theory is that it fails to explain their ability to distinguish lifeforms on the sea floor. A third theory is that the creatures, much like sharks, are triggered to attack with the presence of blood in the water. This explains how sea monarchs can track prey in waters separating them by as much as 3-km (2-mi.)
Individually these creatures are extremely vulnerable to the same pressures and environmental limitations presented to most invertebrate creatures.
