One of the most damaging invasive species in the oceans has breached a major barrier – the Amazon-Orinoco river plume – and is spreading along Brazil’s coast. Scientists are trying to catch up.

Climate change is making oceans more acidic globally. Now, scientists are finding that large storms can send pulses of acidic water into bays and estuaries, further stressing fish and shellfish.

Puerto Rico’s tourism industry is booming as nations lift COVID-19 travel restrictions, but development is displacing people who have lived along its coastlines for years.

In northwest Mexico, biologists are building a network of radio towers to track how individual migratory birds move among important wetland areas.

The 2010 Deepwater Horizon spill caused widespread damage in the Gulf of Mexico, but some parts of this complex ecosystem fared better than others.