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Siphonophores - The longest animals on the planet

Cousins of corals, siphonophores are colonies of specialized individuals called zoids. Some catch and digest their prey, others swim, or lay eggs or sperm.

The Plankton Chronicles series is produced by Noé Sardet, Sharif Mirshak (Parafilms) and Christian Sardet (CNRS) as part of Tara Oceans Expedition and Oceanographic Observatory of Villefranche-sur-Mer (CNRS / UPMC). Fundings by CNRS (INSB / INEE) and by the IBISA program are acknowledged.

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Marine phytoplankton

Marine phytoplankton consist of the microscopic algae that live in suspension in the surface waters of oceans. Most of them are single-celled organisms, but some form chains of several or many cells. ...

Marine zooplankton

Le zooplancton est l'ensemble des animaux qui vivent en suspension dans l'eau des océans. Le terme « plancton » indique que ces animaux se laissent dériver avec les courants, ainsi dès qu'un animal es...

Observation of the oceans and seas

The observation of the seas and oceans nowadays relies on the use of a variety of tools. Besides the classical “research vessel”, research is also based on remotely operated platforms, either satellit...

The ocean seasons

As it is the case on land, seasons give rhythm to life in the world’s oceans. Seasons vary depending on the regions where people live (winter, summer, monsoons, …). They regulate several aspects of th...