Medusa jellies are shaped like disks or bells, with a fringe of stinging tentacles. Most jellies range from 1 to 6 inches in diameter.
Aeginura grimaldii is a narcomedusa, typically found at depths of 1000 meters or more. Very little is known about the natural history of this beautiful jellyfish.
a deep water jelly in Monterey Bay - or an alien spacecraft?
Some siphonophores in the species Praya are probably the longest animals in the world. Their long tails or "stems" may grow up to 50 meters long - longer than a blue whale! They can be very abundant at times and may be top predators in some midwater food chains.
Praya's long stem is covered with cells that have specialized for reproduction (gonozooids), feeding (gastrozooids), and stinging (dactylozooids). Groups of cells that break off can sometimes form entirely new animals..
