UK is home to a diverse range of jellyfish species – encounters with them may become more frequent as the ocean warms.

By studying the fossil record of one group of organisms, researchers now worry that human-driven climate change may return us to an “Earth of 8 million years ago ... detrimentally restructuring the marine communities of the entire ocean.”

Rapid ocean warming could cause a mass exodus of plankton from the tropics, negatively affecting ecosystems and coastal communities that depend on them.

Plankton, some of the smallest organisms on Earth, are leading big changes in the ocean.

World’s largest fish is struggling to navigate crowded ocean highways, a new study suggests.

Tiny marine worm larvae have a survival secret: they turn into carnivores, devouring microscopic crustaceans and other prey living in plankton.

Mountains can’t be created without lubricant, and 2 billion years ago that lubricant was graphite produced by the carbon broken down from layers of dead plankton on the ocean floor.

Studies of Lake Windermere show how organisms moving in lakes help keep water layers fresh and reduce greenhouse gas production.

Studies of Lake Windermere show how organisms moving in lakes help keep water layers fresh and reduce greenhouse gas production.

The plumose anenome dines on a surprising menu item: ants. A new study digs into how they became part of a marine food chain.