Many animals have useful appendages.
Some animals only have arms, others only have tentacles, and some have both.
Squids are one of those wonderful animals that have both arms and tentacles. Squid have eight arms and two tentacles. The arms have adhesive disks or suckers that can be used to hold on to things. The tentacles which are twice as long as the arms only have suckers on the flatened ends. The squid uses its tentacles to grab its prey and its arms to hold it while it eats.