Final answer:
The spiny dogfish is a predator that eats animals like fish, crustaceans, squid, gastropods, and jellyfish, as well as plants like red and brown algae.
Step-by-step explanation:
The spiny dogfish is a predator, meaning that it will eat animals like fish, crustaceans, squid, gastropods, and jellyfish, as well as plants like red and brown algae.