Upwelling causes croakers to croak

205d672d-2622-4a24-b908-96cf632e9260

Editor's Picks
Features Post
The brightest pupils
04 October 2021
Features Post
Dealing with egg ‘fungus’
04 October 2021
Features Post
Rathbun’s tetra in the wild
13 September 2021
Fishkeeping News Post
Report: 2021 BKKS National Koi Show results
13 September 2021
Features Post
The World's forgotten fishes
16 August 2021


An upwelling of very cold water has led to the death of over a million fish off the Maryland coast.

According to the Washington Post, Ocean City has seen a fish kill of Atlantic croakers caused by a cold upwelling which caused a 20F drop in the water temperature.

Experts say that over a million Atlantic croakers, which were swimming about five miles off Ocean City were affected by the subsequent thermal shock caused by the upwelling. Thousands of the fish have washed up on the local beaches.

One expert suggested that the upwelling might have been caused by Hurricane Alex.

For more details on why changes in temperature can kill fish, read our FAQs on temperature.