Also known as Bobtail Squid, Pygmy Squid, Rossie Squid.
Found buried in the sand or muck bottoms with just the eyes showing in bays, fiords of the oceans often at great depths. These squid have a glue gland on their backs so they can cover themselves in sand for camouflage. There is also a light organ in their bellies, that hosts bioluminescent bacteria which produces the iridescent colours.
They feed nocturnally on small crustaceans, fish and smaller squid.
Length - 4.5cm
Depth - 10-550m
Widespread Atlantic Ocean
Some of the smallest squids, they can change colour when predators come near. Ref: https://en.wikipedia.org/wiki/Rossia_palpebrosa