Arthropod and King crab

Arthropod noun - Invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin.

King crab and arthropod are semantically related. In some cases you can replace phrase "King crab" with "Arthropod", this terms are similar.

King crab noun - Large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tail; a living fossil related to the wood louse.

Arthropod and king crab are semantically related. You can use "Arthropod" instead a noun phrase "King crab".