…a species of Ulmarid jellyfish that is the sole member of the subfamily Tiburoniinae. Tiburonia granrojo has been observed in deep waters (around 600 to 1,500 meters) across the Pacific Ocean, including in the Sea of Cortez, Monterey Bay, Hawaii, and Japan. Tiburonia granrojo can grow up to 75 centimeters (30 in) in diameter and in place of the long tentacles found in most other jellyfish it has thick oral arms. Only 23 specimens of Tiburonia granrojo have ever been observed, and only one has been collected (a small [15 cm] specimen) for study.
“[…] is a species of giant deep sea jellyfish in the Ulmaridae family. With only 115 sightings in the last 110 years it is a jellyfish that is rarely seen, but believed to be widespread throughout the world. It is thought to be one of the largest invertebrate predators in the deep sea ecosystem. The jellyfish has an umbrella-shaped bell that can be up to a metre wide. It also has four “paddle-like” arms up to 10 metres long, which, as they lack stinging tentacles, may be used instead to trap prey.”
…is a species of “Moon Jellyfish” (Aurelia spp.) which is known to inhabit the northern Pacific Ocean, ranging from the eastern coast of Japan to the coast of California. Like other jellyfish A. labiata is predatory, using its stinging nematocysts to dispatch small passing invertebrates. A. labiata is very similar to its more common relative A. aurita, and will even occasionally occur in the swarms of A. aurita. However, A. labiata is known to be larger and has a dark brown margin, and well branched subumbrellar canals (canals on the underside of the bell)