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Ocean Currents

News, opinions, photos and facts from Ocean Conservancy

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How to Tell the Difference Between Squid and Cuttlefish

Posted On April 7, 2017 by

The octopus is one of the most well-recognized animals in the sea, but what about their lesser-known cousins? Squid and cuttlefish may not get as many Hollywood roles as their eight-armed relatives, but they’re equally as interesting. Take a minute to explore these tentacled invertebrates—and learn how to tell them apart.

Let’s start with what they have in common. Both squid and cuttlefish are part of class Cephalopoda, which is a type of mollusk that also includes octopus and nautilus. Unlike other mollusks, like clams and snails, most cephalopods have lost their hard outer shells. Cephalopods get their name from the Greek word meaning “head-feet”, because their arms encircle their heads. Both squid and cuttlefish are known as ten-armed cephalopods because they have eight short arms and two long tentacles (as opposed to eight-armed cephalopods like octopuses).

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Eelgrass and Ocean Acidification: California Takes Action

Posted On October 3, 2016 by

What do eelgrass, the California state legislature, crabbers, and Ocean Conservancy have in common? They are all part of the solution in California’s remarkable actions this past week to address the threats that ocean acidification presents to California’s healthy fisheries, marine habitat and coastal jobs.

Governor Jerry Brown just signed into law a pair of bills that will address the concerns over ocean acidification raised by oyster growers, crabbers and others who make a living off of the ocean.

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You Can’t “Kelp” But Have a Good Friday with This Video

Posted On July 13, 2012 by


BBC Earth and the unmatched narration of David Attenborough present the strange life of a Kelp forest, including hand fish that walk on their fins and adorable baby squid.

Quick kelp fact: Under ideal conditions, giant kelp can grow an astonishing two feet each day.

Found on the BBC Earth YouTube Channel