In addition to weather, corals are vulnerable to predation. Fish, marine worms, barnacles, crabs, snails and sea stars all prey on the soft inner tissues of coral polyps.
Corals has no way of fighting since it can’t really move and is rumored not to feel pain at all. My question is, I thought starfish just eat algaes? I did not even know that they can bite or chew corals
Crown-of-thorns have 21 arms, with venomous spikes. These spikes are dangerous both to humans and marine creatures.
Even when a person wears a diving suit or wetsuit, these spikes can pierce through with their brittle and hard build. Although found on the ocean floor, some crown-of-thorns starfish are found under coral rubbles and they are usually the prey to corals.