What recent discovery was made regarding sea starfish turning into goo?

The correct choice reflects a significant finding in marine biology related to the health of sea stars. The discovery of a bacterial cousin of the pathogen behind cholera provides insight into the mechanisms that lead to the deterioration of these organisms, often referred to as turning into "goo." This phenomenon is a result of infections that can devastate sea star populations, which have been experiencing widespread die-offs. Identifying this bacterial link is critical as it allows scientists to better understand the diseases affecting marine life and potentially develop strategies for mitigating these effects.

This understanding is crucial because it sheds light on the broader implications for marine ecosystems, where sea stars play a vital role as predators in maintaining healthy populations of other marine creatures. Other options, while they may be valid topics in marine biology, do not directly relate to the specific finding of a bacterial pathogen responsible for the noted phenomenon in sea stars.