The term 'Octopus Cousin' is a reference to the cephalopod family, which includes both octopuses and squids. The crossword solution for this term is 'SQUID', which is a five-letter word. Squids are marine animals that belong to the same family as octopuses, and they share many of the same characteristics. They have eight arms and two tentacles, and they use jet propulsion to move through the water. Squids are also known for their ability to change color, which helps them blend in with their environment.