In Global proliferation of cephalopods a paper in Current Biology, an esteemed group of marine biologists reports that the population of octopuses (and other cephalopods) is booming thanks to its ability to adapt quickly to ocean acidification and temperature change, which is killing off other types of marine life at alarming rates. Read the rest
An octopus' life is short — two years is a pretty common lifespan — and heavily focused on reproduction. They only get one shot at carrying on the genetic lineage and die soon after breeding. Babies are born not by the two, or tens, or even hundreds. Instead, tens of thousands of octopus siblings enter the world all at once — tiny, translucent hatchlings that ride the waves and try not to die more quickly than they already must.
This footage of an brood of giant Pacific octopuses hatching was filmed by divers in Puget Sound just a couple of weeks ago.
This baby nautilus emerged this week from an egg laid last November at San Diego's Birch Aquarium. For this tiny cephalopod, the process of being born took not hours, or even days, but weeks. The ZooBorns site has a series of photos that show how the nautilus slooooooowly emerged from the egg. Read the rest
This is a great find by Not Exactly Rocket Science's Ed Yong. A tourist and a couple of researchers from the California Academy of Sciences have documented an instance of Pacific-dwelling jawfish hiding from predators by blending into the stripes of well-known camouflage guru, the mimic octopus.
This relationship is probably a rare occurrence. The black-marble jawfish is found throughout the Pacific from Japan to Australia, while the mimic octopus only hangs around Indonesia and Malaysia. For most of its range, the jawfish has no octopuses to hide against. Instead, Ross and Rocha think that this particular fish is engaging in “opportunistic mimicry”, taking advantage of a rare chance to share in an octopus’s protection.
Perhaps you've heard the tale of the octopus that broke out of its tank at the aquarium and walked across the room to break into another tank where it proceeded to eat other forms of sea life.
That story is kind of an urban legend. It's supposedly happened at every aquarium in the world, but can't be confirmed. And experts have told me that the hard floors in an aquarium would likely seriously damage the suction pads of any octopus that tried it.
But the basic idea—that an octopus could pop out of the water and move across dry ground&dmdash;is a very real thing. Here, an octopus at the Fitzgerald Marine Reserve in California hauls itself out of the water, and scoots awkwardly around on land for a little bit (while some apparently Minnesotan tourists gawk), before sliding back into the water. It's not the most graceful sort of travel. But it can be very handy. Octopuses do this in nature to escape predators, and also to find food of their own in tidal pools.
As an added bonus: Scientific American just started an all-octopuses, all-the-time blog called The Octopus Chronicles. Check it out!
Marine biologist Roger Hanlon is king of the color-changing cephalopods. I've talked about him here before. In this video, narrated by NPR's Robert Krulwich, Hanlon demonstrates how much fun his job really is.
Via Robert Krulwich's blog, which has more background on the camouflage gymnastics that cephalopods are capable of.