Our new cuttlefish are growing quickly! Common Cuttlefish (Sepia officinalis) are cephalopods (meaning head-footed), and are in a group of mollusks that also include octopus and squid, the most intelligent of all invertebrates. Cuttlefish are active predators that quickly snatch their prey with a sucker-pad at the end of a long tentacle, bringing it into its sharp beak-like jaw. Common Cuttlefish can grow to 49 cm in mantle length and 4 kg in weight. Here, they are hunting for shrimp.