Drupella Reef Resilience.
Outbreaks of Drupella can cause significant mortality on coral reefs.
Ref Although Drupella outbreaks do occur,
typically Drupella occur in lower densities.
For example, in western Australia and Japan, Drupella outbreaks have drastically reduced coral cover.
However, even at lower densities Drupella can still influence the structure of the reef.
Ref Drupella generally form clusters on dead branches of live coral colonies,
deep in crevices, under corals, or on dead corals.
Ref In northwest Australia, Drupella caused extensive mortality, destroying 90% of corals in
parts of the northern reef at Ningaloo Reef.
In addition to COTS, sea urchins, and Drupella, some fishes(such as butterflyfishes,
parrotfish, puffers, triggerfish, filefish, wrasses, and damselfish) also consume live coral tissue.
Drupella eat live coral tissue by stripping
the tissue from the coral skeleton and leaving white feeding scars that can quickly become covered by algae.
Drupella prefer to feed on fast-growing species with complex,
branching growth forms such as Acropora and Pocillopora, ref but will feed on most corals in the absence of their preferred species.