Georgia Tech ecologists: The lowly sea cucumber may be helping to protect coral reefs against disease

This type of staghorn coral (Acropora pulchra) appeared to benefit from the presence of sea cucumbers (Holothuria atra), a new study finds.

Terry Moore / Terry Moore

Over the years, Cody Clements, a marine ecologist at Georgia Tech, has planted over 10,000 coral fragments across the South Pacific.

“You can just break off a branch from a coral, plant it into the sandy bottom, and it will grow into a whole new coral,” explains Clements. “I have corals out there that I’ve planted and they were the size of my pinky — and now they’re the size of a basketball.”

As he was gearing up for an experiment in 2018 in French Polynesia off the island of Mo’orea, something caught his attention. It had to do with sea cucumbers — marine invertebrates that are distantly related to starfish but resemble soft pickles.