could you please describe them?
Invertebrates with segmented bodies and jointed limbs.
Arthropod
Arthropods are invertebrates with segmented bodies and jointed limbs. The exoskeleton or cuticles consists of chitin, a polymer of glucosamine. 
what is ocean sunfish? One of the heaviest known bony fishes in the world. what do they survive on? Small fish, fish larvae, squid, and crustaceans, etc. what is the last one? Large and diverse arthropod taxon. can the term that you just mentioned be classified? Yes, subdivided into five subphyla. can you name any? UNANSWERABLE where do these creatures get their name from? Greek "árthron" and "pous"
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Arthropod [SEP] Description
Arthropods are invertebrates with segmented bodies and jointed limbs. The exoskeleton or cuticles consists of chitin, a polymer of glucosamine. The cuticle of many crustaceans, beetle mites, and millipedes (except for bristly millipedes) is also biomineralized with calcium carbonate. Calcification of the endosternite, an internal structure used for muscle attachments, also occur in some opiliones.