septum noun [C]. âº a âthin âpart âdividing âtissues or âspaces in an âorgan such as the ânose or âheart: the ânasal septum. (Definition of septum from the Cambridge Advanced Learnerâs Dictionary & Thesaurus Â© Cambridge University Press). Browse. 1  septic.
Unfortunately, the giant squid Architeuthis has not been studied enough to make a comprehensive diet. From the few that have been dissected though, it was discovered that they would eat sperm whales that dive deep underwater.
The paired tail fin is attached to the upper surface of the mantle and is made up of muscle. The colossal squid swims forward through the water by undulating the fin longitudinally. The fin is unusually massive and muscular (1,183 millimetres long and 982 millimetres wide). This probably enables the colossal squid to move forward quite rapidly in short bursts when attacking prey.