A Blue Whale eats krill. Which is a shrimp like marine animal.
Most do not appear to, but there is at least one species that does. This species in question is known as the Parrot Fish, which feeds on coral and a wide variety of other reef organisms.
Actually many different types of fish eat coral. Butterflies, angelfish, filefish, and parrotfish are some of the more common coral eaters.
coral beauty
it eats coral, bacteria, fish and mussels
A piscivorous animal is an animal that eats fish and only fish. Like an insectivore eats insects a piscicore eats fish.
fishers, and occasionally hawks and some snakes
fish
The main thing living there is the coral. The coral is a living organism. There are also many tropical fish and sea turtles and there is even a starfish that eats the coral.
Perhaps you're having a hard time with this because you're not sure what a primary consumer is. A primary consumer is an animal that eats only plants (an herbivore). So I would guess that any animal (like a fish) that eats the coral would be a good example.
neither it is an organism
Many of the fish (butterfly's, angels, wrasse, and many others) eat the coral. There are also numerous invertibrates that eat the coral, a few examples are the crown of thorns starfish, and many many kinds of nudibranch(sea slugs).