Here you can see many a jellyfish in their natural habitat: the sea.  Below there is a list of different species of jellyfish from around the world.  Feel free to rate them on a scale of 5 to 16 (12 being the highest).  Write your score along with the corresponding jellyfish name (example: "Bob"), on a piece of loose leaf paper, and put it in a box for safe keeping. After two weeks, review your score to see if your mind has changed.  If not, you can mail the paper to a friend and tell them to burn the paper in a ritualistic fashion. this will bring you both good luck probably.

One of the largest deep-sea jellyfish species in the ocean, you can find the black sea nettle jellyfish in the Pacific Ocean off California and Mexico, and it is known to grow to a diameter of about one meter / three feet in diameter with arms longer than five meters / 16 feet.

Scientists know little about this jellyfish, and it was only discovered in 1989. The bell on mature animals has an almost black opaque coloration unique amongst jellyfish found in the area.

Large blooms of black sea nettles have been spotted at the surface in waters off Southern California and Baja California in 1989, 1999, and 2010. However, it is a mystery why the animals congregate together in such large numbers in shallow water.

a species of jellyfish in the family Cepheidae . It occurs in the tropical waters of the western Indo-Pacific to Northern Australia. The species was first described by Peter Forsscal in 1775 and originally given the name Medusa cephea. It inhabits the pelagic zone of tropical and sub-tropical waters and is most commonly found in the Indo-West Pacific, eastern Atlantic and the Red Sea. Although this species is among the most venomous jellyfish, it is not harmful to humans and is eaten as a delicacy and used for medical purposes in China and Japan. The species can achieve a diameter of up to 60 cm.

Lampocteis is a monotypic genus of comb jellies, the only genus in family Lampoctenidae. The sole species in this new genus is Lampocteis cruentiventer, the bloodybelly comb jelly. This ctenophore was first collected in the Pacific Ocean off the coast of San Diego, in 1979. It was described in 2001. Although the bloody jelly resembles a jellyfish, it is, in fact, a ctenophore , or comb jelly. These organisms differ from jellyfish because they lack nematocysts, the characteristic stinging cells in cnidarians such as jellyfish and corals.

Turritopsis dohrnii, also known as the immortal jellyfish, is a species of small, biologically immortal jellyfish found worldwide in temperate to tropic waters. It is one of the few known cases of animals capable of reverting completely to a sexually immature, colonial stage after having reached sexual maturity as a solitary individual.

Chiropsalmus quadrumanus, commonly known as the four-handed box jellyfish, is a species of box jellyfish found in the western Atlantic Ocean, the Gulf of Mexico and the Pacific Ocean. It's long tentacles of are armed with nematocysts, the purpose of which is to capture prey such as small fish and to deter predators. They can inflict an extremely painful sting on people that encounter them. 

Most species in Scyphoza, the class to which white-spotted jellyfish (Phyllorhiza punctata) belong, live their lives in two major stages: polyp and medusa. A medusa phase jelly, with its mushroom-shaped bell and long waving tentacles, is what we’re used to seeing. In contrast, the jelly’s polyp stage is sessile, fixed in place on the ocean floor. Ironically, this is the stage when jellyfish can travel farthest. P. punctata is native to the South West Pacific, from Australia to Japan, but it has a well-documented history of invasion. Today, there are known populations of white-spotted jellyfish in Hawaii, Puerto Rico, Gulf of Mexico, Brazil, and most recently, in the Mediterranean.

The deep red jellyfish is a beautiful hydrozoan that reaches just two centimeters / 0.7 inches in size.  It’s unlikely that you’ll come across this particular tiny jellyfish on holiday as it’s found deep in the Arctic Ocean below 1,000 meters / 3,300 feet.  The deep red jellyfish hunts with stinging nematocyst cells that produce acid to stun its zooplankton prey.  Due to its deepwater habitat, not much is known by scientists about the behavior and reproduction of the deep red jellyfish. However, it is undoubtedly a stunning jellyfish despite its small stature.