Jellyfish are among the few types of plankton visible to the human eye. Most plankton is tiny (smaller than two millimeters) and can only be seen with a microscope.

SEATTLE — Moon jellies, a species of jellyfish living in Puget Sound, appear to be able to consume large portions of zooplankton, according to new research.

Plankton refers to all organisms suspended in all types of waters (oceans, lakes, rivers and even groundwaters), including viruses, bacteria, insects, larval fish and jellyfish.

Jellyfish are found in all oceans, from polar to tropical regions. In the future, gelatinous zooplankton could spread even further, as it is generally one of the winners of climate change: unlike ...

The Australian spotted jellyfish can clear 50 cubic meters of plankton-filled water in a day, making them formidable feeders that can out-compete native species. U.S. World ...

Cannonballs are the most prominent species of jellyfish in the Southeast, according to Georgia's DNR website. During the summer and fall, they make up over 16% of biomass on the coastline.

Biologists have speculated that water temperature and abundance of zooplankton -- jellyfish food -- may play a role in allowing the jellyfish to grow to a noticeable size that floats to the surface.

For a long time, scientists assumed that jellyfish were a dead-end food source for predatory fish. However, a team from the Alfred Wegener Institute together with the Thünen Institute has now ...

Nature lovers, now is the time to keep your eyes peeled for Michigan’s rarely seen freshwater jellyfish. These curious aquatic invertebrates are native to China, but were first documented in ...