Up to 93% of corals have been smothered by the sediment brought by the $205 million Deep Dredge project at Port Miami.
An international team of researchers recently bred elkhorn corals (Acropora palamata) in a laboratory setting, to be used to repopulate critically endangered Caribbean reefs. This won't do all the work of fighting warming waters, but it helps.
The noisy claw sounds of snapping shrimp may be a good indication of reef health, researchers say.
NASA recently launched a three-year expedition under its COral Reef Airborne Laboratory (CORAL) that will pair aerial surveys with underwater measurements to get a better idea of reef health.
Butterflyfish depend on food and shelter provided by coral reefs, but they steer clear of those that have come in contact with seaweed. Researchers suggest this may be a strong indicator of their awareness of reef health.