Where can I get one of these and what are they called?

There's a really cute green octopus/squid plushie/cushion that instead of tentacles, has short stubby ones that almost look like [o_o not in a bad way.] It features in an anime - Ore No Imouto Ga Konnani Kawaii Wake Ga Nai, and it's the green cushion on Kirino's bed. Does anyone know where I can find one? They're SO CUTE!