How cephalopods see colour

Researchers from the UC Berkeley and Harvard University propose “colourblind” cephalopods may be able to see colour after all!

The father and son team Alexander and Christopher Stubbs, suggest octopus and cuttlefish use their large, wide pupils to accentuate the refraction of different wavelengths of light. They may be able to sense colour by bringing certain wavelengths into focus on the retina.

Click here to see the full journal paper.

Pajama squid

The striped pyjama squid, Sepioloidea lineolata, is one of just a few known poisonous cephalopods.
The dramatic coloration of the species may be a form of aposematism, a warning signal that the species is poisonous.