MIAMI — Thousands of fish, eels and turtles are dying, sometimes as far as the eye can see, in parts of southwest Florida. Just this week, one of several lifeless manatees was pulled from the water.

SM PIER — Every week, senior aquarist Jose Bacallaos and his team go diving in the Santa Monica Bay looking for algae, kelp and sometimes small animals for the Santa Monica Pier Aquarium. On Tuesday, ...

A toxic algae called “Heterosigma akashiwo” is blooming in San Francisco Bay, causing the water to look murky and brown and posing a danger to local marine life. The ongoing bloom could kill fish and ...

Brown algae is a common problem in many fish tanks, especially those that have been recently set up. It’s not dangerous to fish but can turn your beautiful aquarium into an ugly mess. This slimy layer ...