Few marine creatures are as mysterious and intimidating as jellyfish. Instead of a brain, jellyfish possess an elementary nervous system, or nerve net, which consists of receptors capable of detecting light, odor and other stimuli. Jellyfish have no nerves; no blood, no heart and no brain, and their bodies consist 95% of water. Jellyfish move like ghosts through the water. They swim around by contracting movements of their umbrella or float easily. Jellyfish have been around for more than 650 million years, and different species of jellyfish can be found in all the worlds’ oceans. Jellyfish have tiny stinging cells in their tentacles to stun or paralyze their prey before they eat them. Inside their bell-shaped body is an opening that is its mouth. They eat and discard waste from this opening.
SPECIES & CURIOSITIES:
- Moon Jellyfish (Aurelia aurita): Also called the moon jelly is a widely studied species of the genus Aurelia. All species in the genus are closely related, and it is difficult to identify Aurelia medusae without genetic sampling; most of what follows applies equally to all species of the genus.
- White spotted Jellyfish (Phyllorhiza punctata): White-spotted jellies are native to the warm, tropical waters of the western Pacific Ocean, from Oceania through East Asia.
White-spotted jellies have very mild venom and do not pose a threat to human beings. In fact, these jellies do not generally use their venom to capture food at all. Instead, white-spotted jellies are filter feeders, like oysters or sponges.
- Blubber Jelly (Catostylus mosaicus): Cassiopea (upside-down jellyfish) is a genus of true jellyfish and the only members of the family Cassiopeidae. Down is up for this jelly—it rests its bell on the seafloor and waves its lacy underparts up toward the sun. Why? This jelly is a farmer. Its brownish colour is caused by symbiotic algae living inside the jelly's tissues. By lying upside-down, the jelly exposes its algae to the sun, allowing it to photosynthesize. The jelly lives off food the algae produce, as well as zooplankton.
- Flame Jellyfish (Rhopilema esculentum), inhabits coastal waters of the Pacific Ocean, reaches 10 cm in diameter, this type of jellyfish is part of the diet of people in China and elsewhere in East Asia.
- Compass Jellyfish - Chrysoara pacifica
It presents a umbrela flattened, between 1 and 12 cm in diameter, with 24 tentacles, 8 organs sensory and 32 lobes Peripheral. Is coloring white beige 16 features bands radial brownish.
- Golden Medusa (Papuan Mastigias)
It inhabits coastal waters of the Indo-Pacific, measuring up to 80 cm in diameter and has 8 oral arms instead of tentacles, its great threat to marine pollution.