How many species of jellyfish are there? Jellyfish are sometimes called sea jellies ... For example, the famous Portuguese man o’ war is part of the class Hydrozoa but is known as a siphonophore. They ...

These fish species are immune to the lion's mane ... Though technically a siphonophore and not a jellyfish, the Man O' War is so closely related that people lump them into the same category.

This beautiful siphonophore, Pyrostephos vanhoeffeni, is typically encountered in Antarctic waters. Siphonophores are not an individual animal, but a colony of individuals that all serve a ...

Watch out for Man-o-Wars along the beaches of North Carolina! Cape Lookout National Seashore officials issued a warning last ...

Not only is it not a jellyfish, it's not even an "it," but a "they." The Portuguese man-of-war is a siphonophore, an animal made up of a colony of organisms working together. The man-of-war ...

This jellyfish species, reaching up to 7 inches in diameter, is identifiable by its visible stomach and gonads. The many-ribbed jellyfish uses bioluminescence as a defense mechanism against predators.

The National Oceanic and Atmospheric Administration (NOAA) spotted a surreal new species of jellyfish during an expedition to the "Enigma Seamount," a ridge in the Marianas Trench. The colorful ...

Jellyfish are known for drifting to and fro at the whim of ocean currents—but not all species are so passive. The millions of golden jellyfish that pack Palau’s Jellyfish Lake spend much of ...

GEORGE TOWN: Two species of the deadly box jellyfish, previously not thought to exist here, are breeding in the sea around Penang. Their venom causes Irukandji Syndrome, which includes severe ...