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Sediment Core Close-Up
These deep-sea sediment cores were drilled from beneath the seafloor, and hold...
How long have jellyfish lived in the ocean? This jellyfish fossil is from the...
Dugongs, along with manatees, make up a group of marine mammals called sirenians or...
Transparent sea jelly
Many jellyfish in the class Hydrozoa, such as this hydromedusa Aglantha digitale,...