NOAA has declared the deaths of more than 120 dolphins off the coast of Texas an “unusual mortality even,” the Huffington Post is reporting. 

Scientists think the rash of deaths could be related to a toxic algae bloom called “red tide” that was prompted by the extreme, record-setting drought in the region. (Climate experts have linked it to global warming.)

Some of the dolphins washing up on the coast were also underweight, had discolored teeth and lung disease, worrying scientists that the mammals were suffering from health effects from the 2010 Gulf oil spill. Four of the dolphins were also found to have a muddy substance in their stomachs. 

Read the full story here. 

It’s a continuation of sad news for dolphins. 

Lung disease was found in hundreds of the marine mammals that have washed up on the northern Gulf coast since the spill. 

And Peru is battling its own dolphin tragedy. Hundreds of dolphins have died in the coastal waters. Scientists aren’t sure why, but some think it’s linked to either warming waters or seismic testing by oil and gas companies.