Final answer:
Wrasse fish feed on parasites found on other fish therefore they are classified as carnivores, consuming living organisms as their source of energy.
Step-by-step explanation:
When considering the feeding habits of the wrasse fish, which feeds on parasites found on the black sea bass's body, the correct classification for the wrasse would be carnivores. This is because they eat other organisms (the parasites), as opposed to consuming plants (herbivores) or breaking down organic debris (detritivores). Carnivores are animals that derive their energy and nutrient requirements by consuming other animals. As wrasse fish target and consume parasites that reside on other fish, they engage in a mutually beneficial relationship with their hosts, helping to keep them free from parasites.