アオリイカの仲間である雄のクワイカが珊瑚の下のふさわしい穴を調べ、そこに素早く産卵する雌を覆うようにして守る。かつてアオリイカ(学名 Sepioteuthis lessoniana)は一つの種と考えられていたが、今は少なくとも3種に分かれていると知られている。まだ科学的な学名は与えられていないものの、沖縄ではシロイカ、クワイカ、アカイカとそれぞれ別の名前がつけられている。珊瑚や岩の下に卵を産む習性は他の2種と違うクワイカの特徴の一つである。



Rearing octopus hatchlings

Octopuses, like other cephalopods, are quite difficult to sex due to lack of any external distinguishing characteristics. A trained eye may be able to spot the hectocotylus arm of the males – a specialized reproductive arm used to deliver spermatophores to the females. Additionally, females tend to be larger than males among most species. However, this can be quite ambiguous due to the different ages of the animals.

Octopus Catching

On the 12th of December, members of the Reiter Unit and the Cephalopod Care Team assembled at 10pm on the shores of Okinawa. After waiting several weeks for the stormy weather to clear up, we finally had the perfect weather and the low tide we needed for catching some octopuses. Geared up in our water shoes and armed with nets and torches we started our fieldwork with reef walking along the shore.

AMICUS Student Presentation

On the 12th of January, several OIST researchers presented their work to local middle school students from Okinawa AMICUS International. Sen, a member of the Computational Neuroethology Unit, also presented her work with the octopuses. The students learned about the different behaviors and body patterns exhibited by these animals and were fascinated by their learning and memory capabilities.

New Logo!

Thank you to Sofia Jain for the design.

Check out more of her work at

New paper! Visual Perception and Cuttlefish Camouflage

Sam and Gilles' paper is out in Current Opinion in Neurobiology!

Image by Stephen Junek.