Answer: Commensalism
Step-by-step explanation:
Commensalism is a type of feeding relationship between organisms of two (2) species, it is characterised by one organism gaining food and benefiting from another organisms without causing harm to the organism.
In Commensalism, one organism benefits and the other doesn't get any benefit nor get hurt.
Commensalism is the feeding relationship between triggerfish and other fishes.
Triggerfish are carnivorous,hence they eat mainly urchins,worms, crabs, shrimps and several types of invertebrates,they also feed on animals that attach themselves to corals and this gives an impression of them feeding from the corals whereas no harm is being done hence the Commensalism