#1) To which group do the tuna, salmon, and swordfish belong?
Answer: Osteichthyes. Popularly referred to as the bony fish, is a diverse taxonomic group of fish that have skeletons primarily composed of bone tissue, as opposed to cartilage. The vast majority of fish are members of Osteichthyes, which is an extremely diverse and abundant group. It is the largest class of vertebrates in existence today.
