Octopuses have 2 eyes and 4 pairs of arms and are bilaterally symmetric. An octopus has a hard beak, with its mouth at the center point of the arms. Octopus lack an internal or external skeleton allowing them to squeeze through tight places. Octopuses are among the most intelligent and behaviorally flexible of all invertebrates.
Rare Glowing Flower Hat Jellyfish (Osaka Aquarium, Japan.) When it's not using its long, pink tipped tentacles, it will curl them upwards towards its pin-striped bell to sit and wait until some kind of prey comes along.