Unlike nearly all other invertebrates Cuttlefish are highly intelligent. They have very big brains for their size and believe it or not, are related to snails, slugs, octopuses, squids, nautiluses, and vampire squids.
Cuttlefish use hypnosis to catch their prey. They use flashing colours on their skin to make swirling patterns that their prey are attracted to, and when their prey comes close enough out shoot two long feeding tentacles to catch them and draw the prey towards the Cuttlefish’s horny beak!
Image Attribution: prilfish , under Creative Commons license
Featured image attribution: NeilsPhotography under Creative Commons license